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B2 noun #40 most common 12 min read

crystals

Top 40

Practice it Examples Notes & Tips crystals in 30 Seconds

Explanation crystals in your Level:

Crystals are beautiful things that come from nature. They are often very hard and have many different colors. Some crystals are clear like water, and some are purple, green, or blue. You can find them in the ground or in special shops. Many people like to wear crystals as jewelry, like rings or necklaces. Salt and sugar are also made of tiny crystals. When you look at salt very closely, you can see small square shapes. Snow is also made of crystals. Each snowflake is a tiny ice crystal. People like crystals because they shine and look pretty in the light. They are not like soft rocks; they are usually smooth and have sharp edges. You might see crystals in a museum or in a jewelry store. They are special stones that people have loved for a long time.

Crystals are solid materials where the parts inside are arranged in a very neat and regular way. This regular pattern makes them grow into beautiful shapes with flat sides. You can find crystals in many places. For example, when water freezes, it forms ice crystals. When you cook, you use salt and sugar crystals. Many expensive stones, like diamonds and emeralds, are actually crystals that formed deep inside the Earth millions of years ago. People use crystals for many things. Some people use them for decoration in their homes because they reflect light and make rainbows. Other people wear them in jewelry. Scientists also use crystals in technology, like in watches and computers. Crystals can be very small, like a grain of sand, or very large, like a big rock. They are interesting because of their perfect shapes and bright colors.

Crystals are substances in which the atoms or molecules are packed together in a regular, repeating pattern. This internal structure is what gives crystals their characteristic geometric shapes and flat surfaces. In nature, crystals form when liquids cool down or when water evaporates, leaving minerals behind. Common examples include quartz, which is found in many types of rock, and sea salt, which forms as ocean water dries up. In everyday life, we encounter crystals in various forms. 'Crystal' can refer to high-quality glass used for bowls and glasses, which is known for its clarity and 'ring' when tapped. In the world of science and industry, crystals are vital. For instance, silicon crystals are used to make the microchips in our electronic devices. Many people also believe that certain crystals have special meanings or can help with health, although this is not proven by science. Whether you are looking at a diamond ring or a snowflake, you are seeing the amazing result of nature's organized structure.

Crystals are solid materials characterized by an internal structure where the constituent atoms, ions, or molecules are arranged in a highly ordered, repeating lattice that extends in all three dimensions. This microscopic order often results in macroscopic features such as symmetrical faces and sharp angles. The process of crystal formation, known as crystallization, occurs under specific environmental conditions, such as the slow cooling of magma or the precipitation from a saturated solution. In geology, crystals are the primary components of minerals, and their size and shape can provide clues about the geological history of a region. Beyond geology, the term 'crystals' is frequently used in the context of luxury goods, such as lead crystal glassware, which is prized for its high refractive index and brilliance. Furthermore, crystals play a crucial role in modern technology; for example, the piezoelectric properties of quartz crystals are utilized in oscillators for timekeeping and frequency control. In popular culture, crystals are often associated with various metaphysical properties, leading to a significant market for 'healing stones.' Understanding crystals requires a balance of scientific knowledge and an appreciation for their aesthetic and cultural significance.

Crystals represent the solid state of matter where the arrangement of atoms follows a strict periodic symmetry. This structural regularity is described by the crystal lattice, a mathematical abstraction that defines the positions of particles in space. The physical properties of a crystal, such as its hardness, electrical conductivity, and optical characteristics, are directly determined by its lattice structure and the nature of the chemical bonds within it. For example, the difference between a diamond and graphite—both made of carbon—lies entirely in their crystalline arrangement. In industrial applications, the production of high-purity single crystals is essential for the semiconductor industry, where silicon ingots are grown and then sliced into wafers. Crystallography, the study of these structures, has been instrumental in numerous scientific breakthroughs, including the determination of the structure of complex biological molecules like DNA and proteins. While the term is often used colloquially to describe decorative glass or semi-precious stones, its scientific meaning is far more rigorous, encompassing a vast array of materials that form the foundation of solid-state physics and materials science.

The crystalline state is defined by long-range translational symmetry, where a fundamental unit cell is repeated infinitely in space. This structural periodicity distinguishes crystals from amorphous solids, which lack long-range order. The macroscopic morphology of a crystal is a manifestation of its internal point group symmetry, a concept central to the field of mineralogy and solid-state chemistry. Advanced techniques such as X-ray, neutron, and electron diffraction are employed to probe these structures at the atomic level, allowing scientists to map electron density and identify atomic coordinates with extreme precision. The physical phenomena exhibited by crystals, such as birefringence in calcite or the semiconductor properties of doped silicon, are exploited in a wide range of sophisticated technologies, from fiber-optic communications to integrated circuitry. Furthermore, the thermodynamics of crystallization—involving nucleation and growth kinetics—is a complex field of study with implications ranging from pharmaceutical manufacturing to the understanding of planetary formation. In a broader cultural sense, crystals have historically served as metaphors for clarity, purity, and perfection, reflecting the human fascination with the inherent order found in the natural world. Thus, the study of crystals bridges the gap between fundamental physical laws and the tangible beauty of the material universe.

Practice it Examples Notes & Tips

crystals in 30 Seconds

Crystals are solids with ordered atomic structures.
They form naturally through cooling or evaporation.
Commonly used in jewelry, electronics, and science.
Known for their geometric shapes and light reflection.

The term crystals refers to solid materials whose constituent atoms, molecules, or ions are arranged in an orderly, repeating, three-dimensional pattern. This internal geometric regularity often manifests externally as smooth, flat surfaces called faces, which meet at specific angles. In a scientific context, crystals are the fundamental building blocks of most minerals and many synthetic materials. From the salt on your dinner table to the silicon chips in your smartphone, the crystalline state is ubiquitous in the physical world. The study of these structures, known as crystallography, is a cornerstone of chemistry, physics, and geology. When people use the word in everyday conversation, they are often referring to clear, sparkling minerals like quartz or amethyst, or to high-quality glassware that has a high refractive index, making it sparkle more than ordinary glass.

Scientific Definition: A solid characterized by a periodic spatial arrangement of atoms.

The geologist carefully extracted the quartz crystals from the granite matrix.

Beyond the laboratory, the word has significant cultural and commercial weight. In the jewelry industry, crystals are valued for their clarity, color, and how they interact with light. Diamonds, for instance, are crystals of pure carbon. In the 'New Age' or spiritual community, crystals are often associated with healing properties, energy work, and meditation. People might keep 'healing crystals' in their homes or wear them as talismans. This usage focuses less on the chemical composition and more on the perceived vibrational or symbolic qualities of the stones. Additionally, the term is used in electronics; quartz crystals are essential for keeping time in watches and stabilizing frequencies in radio transmitters due to their piezoelectric properties.

Common Contexts: Geology, Chemistry, Jewelry, Electronics, Spirituality, and Home Decor.

Snowflakes are actually complex ice crystals that form in the atmosphere.

The formation of crystals, or crystallization, occurs when a substance transitions from a liquid or gas to a solid state under specific conditions of temperature and pressure. This can happen through the cooling of molten rock (magma) to form igneous rocks, the evaporation of mineral-rich water to form evaporites like salt, or the slow precipitation of minerals within cavities in the earth. The size of the crystals often tells a story about how they formed; for example, large crystals usually indicate a very slow cooling process, allowing atoms more time to find their places in the lattice. Small or microscopic crystals suggest rapid cooling. This distinction is vital for scientists reconstructing the history of the Earth's crust or for engineers creating synthetic gems in a lab.

The cave was filled with giant selenite crystals, some over ten meters long.

Industrial Use: Silicon crystals are sliced into wafers to create the microchips found in almost all modern electronics.

Sugar crystals formed on the string as the saturated solution cooled down.

The chandelier was draped in hundreds of lead crystals that caught the evening light.

Using the word crystals correctly depends on whether you are speaking scientifically, decoratively, or metaphorically. As a plural noun, it usually refers to multiple individual units of crystalline material. In scientific writing, it is often paired with specific mineral names or chemical descriptors. For example, one might write about 'calcium oxalate crystals' in a medical report or 'liquid crystals' in a discussion about display technology. When describing the physical appearance of something, 'crystals' can evoke images of sharpness, clarity, and light. It is a versatile word that can describe something as small as a grain of salt or as large as a geological formation.

Descriptive Adjectives: Jagged, translucent, microscopic, shimmering, prismatic, faceted, raw, polished.

The morning frost left delicate ice crystals on the windowpane.

In a more casual or decorative sense, 'crystals' is often used to describe jewelry or home accents. You might say, 'She wore a necklace made of amethyst crystals.' Here, the word emphasizes the natural, unrefined, or multi-faceted beauty of the stones. It is also common to see the word used in the context of 'crystal healing,' where sentences might revolve around 'cleansing crystals' or 'charging crystals under the moonlight.' While these uses are not scientific, they represent a significant portion of how the word is used in modern English. Metaphorically, the singular 'crystal' is often used as an adjective to mean 'very clear' (e.g., 'crystal clear water'), but the plural 'crystals' is almost always reserved for the physical objects themselves.

Verb Pairings: Form, grow, precipitate, dissolve, shimmer, reflect, refract, harvest.

Scientists are trying to grow protein crystals in space to study their structure better.

Furthermore, 'crystals' appears in technical terms like 'liquid crystals,' which are substances that flow like a liquid but have molecules oriented in a crystal-like way. This is the 'LC' in 'LCD' (Liquid Crystal Display). In this context, the word is part of a compound noun and refers to a specific state of matter. In chemistry labs, you might hear instructions like 'filter the crystals from the solution' or 'wash the crystals with cold ethanol.' These sentences treat crystals as the end product of a chemical reaction or purification process. Whether you are describing the beauty of a diamond or the technical specifications of a computer screen, the word 'crystals' implies a level of structural perfection and order.

The salt crystals crunched under his boots as he walked across the dried lake bed.

Common Collocations: Quartz crystals, ice crystals, salt crystals, sugar crystals, healing crystals, liquid crystals.

The museum displayed a collection of rare emerald crystals found in Colombia.

The light hit the hanging crystals, casting rainbows across the walls.

You are likely to encounter the word crystals in a variety of real-world settings, each with its own specific nuance. In a school or university setting, you'll hear it in science classes—chemistry, physics, and geology. Teachers might discuss the 'crystal lattice' or the process of 'crystallization.' If you visit a natural history museum, the mineralogy section will be filled with labels describing various 'crystals' found in the Earth's crust. In these environments, the word is used with precision to describe the physical and chemical properties of matter.

Academic Setting: 'The X-ray diffraction pattern revealed the symmetry of the protein crystals.'

In the lab, we watched as the copper sulfate crystals began to grow.

Another common place to hear the word is in the retail and fashion sectors. Jewelry stores often advertise 'Swarovski crystals' or 'crystal-encrusted' accessories. Here, the word is synonymous with luxury, sparkle, and decorative beauty. Similarly, in high-end home decor shops, you might hear staff talk about 'crystal stemware' or 'crystal chandeliers.' In this context, 'crystal' often refers to a specific type of high-quality glass that contains lead or other minerals to increase its brilliance. While technically different from geological crystals, the term is used interchangeably in the consumer market to denote a premium product.

Retail Setting: 'These earrings feature genuine Austrian crystals set in sterling silver.'

The shop assistant polished the crystals until they gleamed under the spotlights.

In the wellness and alternative medicine community, 'crystals' is a buzzword. You’ll hear it in yoga studios, metaphysical shops, and on social media platforms like Instagram or TikTok. Practitioners might talk about 'charging your crystals' or 'the healing power of crystals.' In these circles, the word is imbued with spiritual significance. Finally, you might hear the word in the tech industry, specifically regarding 'liquid crystals' used in displays or 'quartz crystals' used in electronics. Whether you're at a high-tech manufacturing plant or a quiet meditation retreat, the word 'crystals' is likely to come up, though its meaning will shift to fit the environment.

She placed several rose quartz crystals around the room to promote a sense of peace.

Wellness Setting: 'Many people use amethyst crystals to help with sleep and relaxation.'

The chef sprinkled large sea salt crystals over the finished steak.

The watchmaker replaced the tiny quartz crystals to fix the timekeeping issue.

One of the most frequent mistakes learners make with the word crystals is confusing it with 'glass.' While high-quality glassware is often called 'crystal,' scientifically, glass is an amorphous solid, meaning its atoms are disorganized. True crystals have a highly ordered structure. In writing, it's important to distinguish between 'crystal' as a material and 'crystals' as individual objects. For example, you would say 'The vase is made of crystal' (material), but 'There are many crystals in the vase' (objects). Another common error is the misspelling of the word, often confusing it with 'chrystal' (an archaic spelling) or 'krystal' (often used in brand names but incorrect in standard English).

Mistake: Glass vs. Crystal: Incorrect: 'I found some glass crystals on the beach.' (Unless it's actually glass, use 'mineral crystals' or just 'crystals').

The researcher noted that the sample contained crystals, not just amorphous glass.

Another mistake involves the pluralization and countability. 'Crystal' can be an uncountable noun when referring to the substance ('The window was made of crystal') or a countable noun when referring to specific units ('The salt crystals were large'). Learners sometimes use the plural 'crystals' when they should use the singular 'crystal' as a modifier. For instance, 'crystal clear' is a fixed idiom; saying 'crystals clear' is incorrect. Similarly, 'crystal growth' is the standard term for the process, not 'crystals growth.' Understanding when to use the word as a noun versus an adjective is key to sounding natural.

Mistake: Idiomatic Usage: Incorrect: 'The instructions were crystals clear.' Correct: 'The instructions were crystal clear.'

It is important to use the singular form in the phrase crystal clear.

In scientific contexts, learners might confuse 'crystals' with 'minerals' or 'rocks.' While many minerals form crystals, not all rocks are made of visible crystals. A rock like obsidian is volcanic glass and has no crystals. Conversely, a single crystal is not usually called a 'rock' in a scientific paper; it's a 'crystal specimen' or a 'mineral grain.' Using the term 'crystals' too broadly to describe any pretty stone can lead to inaccuracies in technical writing. Finally, be careful with the word 'crystalline.' It is an adjective meaning 'having the structure of a crystal,' and it shouldn't be confused with the noun 'crystals.' For example, 'The substance is crystalline' is correct, while 'The substance is crystals' might be grammatically shaky depending on the context.

The geologist explained that while all crystals are minerals, not all minerals are found as large crystals.

Mistake: Spelling: Avoid: 'Chrystal', 'Kristal', 'Cristal' (unless referring to the champagne brand).

Check your spelling to ensure you haven't written chrystals by mistake.

The liquid crystals in the screen respond to electrical signals.

When looking for synonyms or alternatives to crystals, the choice depends heavily on the context. In a geological or scientific setting, 'minerals' or 'specimens' might be more appropriate. A 'mineral' is a naturally occurring inorganic solid with a definite chemical composition and a crystalline structure. While 'crystals' refers to the physical form, 'mineral' refers to the substance itself. 'Specimen' is a more general term used by collectors and scientists to refer to a specific piece of a mineral or rock. In the world of jewelry, 'gemstones' or 'gems' are the most common alternatives. A gemstone is a piece of mineral crystal which, in cut and polished form, is used to make jewelry. Not all crystals are gemstones (e.g., salt crystals), and not all gemstones are crystals (e.g., amber or pearl).

Comparison: Crystals vs. Gemstones: Crystals are defined by their atomic structure; gemstones are defined by their beauty and use in jewelry.

The jeweler showed us several raw crystals before they were cut into gemstones.

In everyday language, 'grains' or 'flakes' can sometimes be used as alternatives, especially for substances like salt, sugar, or snow. You might talk about 'grains of salt' instead of 'salt crystals,' or 'snowflakes' instead of 'ice crystals.' These terms are less technical and more descriptive of the object's size and shape. In the context of glassware, 'lead glass' or 'flint glass' are technical terms for what is commonly called 'crystal.' If you are writing a formal report on glassware, using 'lead glass' might be more accurate than 'crystals.' For decorative items, 'ornaments' or 'trinkets' could be used, though these are much broader terms and don't specifically imply a crystalline structure.

Comparison: Crystals vs. Grains: 'Grains' usually refers to size and texture, while 'crystals' refers to the internal atomic order.

The beach was composed of tiny quartz crystals, often called sand grains.

Another related term is 'lattice.' While not a synonym for 'crystals,' a 'lattice' is the abstract geometric framework that defines a crystal. In advanced physics or chemistry, you might discuss the 'crystal lattice' rather than just 'the crystals.' For something that looks like a crystal but isn't, you might use the adjective 'crystalline' or 'glassy.' 'Crystalline' implies order, while 'glassy' or 'amorphous' implies a lack of it. In the spiritual community, 'stones' or 'healing stones' are often used interchangeably with 'crystals.' Choosing the right word helps you communicate with precision, whether you are describing a scientific phenomenon, a piece of fine jewelry, or a decorative object.

The DNA molecule was mapped using X-ray images of its crystals.

Comparison: Crystals vs. Prisms: A prism is a geometric shape that can be made of crystal, glass, or plastic; it is defined by its function of refracting light.

The sunlight passed through the crystals, acting like tiny prisms.

The geologist collected several mineral crystals for his research.

How Formal Is It?

Formal

Neutral

Informal

Child friendly

Slang

Fun Fact

The ancients believed that rock crystal (quartz) was actually ice that had frozen so hard it could never melt.

Pronunciation Guide

UK /ˈkrɪstəlz/

US /ˈkrɪstəlz/

The stress is on the first syllable: KRIS-tuhlz.

Rhymes With

pistols whistles thistles missals bristles dismissals epistles gristles

Common Errors

Pronouncing the 'y' like 'eye' (it should be a short 'i').
Adding an extra vowel sound between 't' and 'l'.
Pronouncing the final 's' as a sharp 's' instead of a 'z' sound.

Difficulty Rating

Reading 3/5

The word is common but technical contexts can be difficult.

Writing 2/5

Easy to spell but pluralization rules vary by context.

Speaking 2/5

Pronunciation is straightforward for most learners.

Listening 2/5

Distinct sound, rarely confused with other words.

What to Learn Next

Prerequisites

stone rock shape clear hard

Learn Next

mineral lattice symmetry refraction geology

Advanced

crystallography anisotropy piezoelectricity nucleation diffraction

Grammar to Know

Nouns as Adjectives

In 'crystal bowl', the noun 'crystal' acts as an adjective to describe the material.

Plural Countable Nouns

'Crystals' follows standard pluralization rules for countable objects.

Uncountable Substances

When referring to the material, 'crystal' is uncountable: 'The vase is made of crystal.'

Compound Adjectives

'Crystal-clear' uses a hyphen to join the noun and adjective into a single modifier.

Scientific Plurals

In chemistry, 'crystals' often refers to the solid product of a reaction.

Examples by Level

I have a box of colorful crystals.

J'ai une boîte de cristaux colorés.

Plural noun 'crystals' used as the object of the sentence.

The salt crystals are very small.

Les cristaux de sel sont très petits.

Subject 'salt crystals' followed by the verb 'are'.

Look at the shiny crystals in the shop.

Regarde les cristaux brillants dans la boutique.

Imperative sentence using 'crystals' as the object.

She wears a necklace with blue crystals.

Elle porte un collier avec des cristaux bleus.

Prepositional phrase 'with blue crystals' modifying 'necklace'.

Snow is made of tiny ice crystals.

La neige est faite de minuscules cristaux de glace.

Passive construction 'is made of'.

The crystals shine in the sun.

Les cristaux brillent au soleil.

Simple present tense for a general fact.

He found some crystals in the garden.

Il a trouvé des cristaux dans le jardin.

Use of 'some' with a plural countable noun.

Sugar crystals are sweet.

Les cristaux de sucre sont sucrés.

General statement about a plural noun.

Crystals grow in different shapes and sizes.

Les cristaux poussent dans différentes formes et tailles.

Intransitive use of the verb 'grow' with 'crystals'.

You can see the crystals clearly with a magnifying glass.

On peut voir les cristaux clairement avec une loupe.

Use of the modal 'can' and the adverb 'clearly'.

My mother has a beautiful crystal bowl.

Ma mère a un magnifique bol en cristal.

'Crystal' used as an adjective (modifier) here.

Scientists study how crystals form in nature.

Les scientifiques étudient comment les cristaux se forment dans la nature.

Noun clause 'how crystals form' as the object of 'study'.

These crystals are very expensive because they are rare.

Ces cristaux sont très chers parce qu'ils sont rares.

Causal clause starting with 'because'.

The cave was full of giant white crystals.

La grotte était pleine de cristaux blancs géants.

Adjective 'full of' followed by the noun phrase.

We used sugar crystals to make the cake look pretty.

Nous avons utilisé des cristaux de sucre pour rendre le gâteau joli.

Infinitive of purpose 'to make'.

The light reflects off the crystals on the wall.

La lumière se reflète sur les cristaux sur le mur.

Prepositional phrase 'off the crystals'.

The museum has a famous collection of quartz crystals.

Le musée possède une célèbre collection de cristaux de quartz.

Compound noun 'quartz crystals'.

Many people believe that crystals can help you feel better.

Beaucoup de gens croient que les cristaux peuvent vous aider à vous sentir mieux.

That-clause expressing a belief.

The chemist explained that the crystals were pure.

Le chimiste a expliqué que les cristaux étaient purs.

Reported speech with 'explained that'.

If you cool the liquid slowly, larger crystals will form.

Si vous refroidissez le liquide lentement, de plus grands cristaux se formeront.

First conditional sentence structure.

The chandelier was decorated with hundreds of small crystals.

Le lustre était décoré de centaines de petits cristaux.

Passive voice 'was decorated with'.

She bought some amethyst crystals to put on her desk.

Elle a acheté des cristaux d'améthyste pour les mettre sur son bureau.

Specific mineral name 'amethyst' used as a modifier.

The salt crystals dissolved quickly in the boiling water.

Les cristaux de sel se sont dissous rapidement dans l'eau bouillante.

Past tense of 'dissolve' with an adverb.

Liquid crystals are used in the screens of most laptops.

Les cristaux liquides sont utilisés dans les écrans de la plupart des ordinateurs portables.

Technical term 'liquid crystals' in the passive voice.

The geometric symmetry of the crystals was truly remarkable.

La symétrie géométrique des cristaux était vraiment remarquable.

Abstract noun 'symmetry' followed by a prepositional phrase.

Geologists use the size of crystals to determine how fast magma cooled.

Les géologues utilisent la taille des cristaux pour déterminer à quelle vitesse le magma a refroidi.

Complex sentence with an infinitive of purpose and a noun clause.

The high lead content in the crystals gives the glass its brilliance.

La forte teneur en plomb des cristaux donne au verre son éclat.

Subject-verb agreement with a complex subject.

The company specializes in growing synthetic crystals for industrial use.

L'entreprise se spécialise dans la culture de cristaux synthétiques pour un usage industriel.

Gerund 'growing' after the preposition 'in'.

He examined the microscopic crystals under a polarized light microscope.

Il a examiné les cristaux microscopiques sous un microscope à lumière polarisée.

Use of technical adjectives like 'microscopic' and 'polarized'.

The healing properties of crystals are often debated by scientists.

Les propriétés curatives des cristaux sont souvent débattues par les scientifiques.

Passive voice 'are often debated'.

The delicate ice crystals formed a pattern like lace on the window.

Les délicats cristaux de glace ont formé un motif semblable à de la dentelle sur la fenêtre.

Simile 'like lace' used for description.

The solution was filtered to remove any remaining crystals.

La solution a été filtrée pour éliminer tout cristal restant.

Passive voice and infinitive of purpose.

The X-ray diffraction pattern provided a blueprint of the crystals' atomic structure.

Le diagramme de diffraction des rayons X a fourni un plan de la structure atomique des cristaux.

Possessive plural 'crystals''.

Anisotropy in crystals means that their physical properties vary with direction.

L'anisotropie dans les cristaux signifie que leurs propriétés physiques varient selon la direction.

Technical term 'anisotropy' explained in the sentence.

The semiconductor industry relies on the production of flawless silicon crystals.

L'industrie des semi-conducteurs repose sur la production de cristaux de silicium sans défaut.

Verb 'relies on' followed by a complex noun phrase.

The researcher observed the nucleation of crystals in the supersaturated solution.

Le chercheur a observé la nucléation de cristaux dans la solution sursaturée.

Technical vocabulary: 'nucleation', 'supersaturated'.

Crystals of this mineral are typically found in hydrothermal vents.

Les cristaux de ce minéral se trouvent généralement dans les cheminées hydrothermales.

Adverb 'typically' modifying the passive verb 'are found'.

The brilliance of the crystals was enhanced by the precision of the cut.

L'éclat des cristaux a été rehaussé par la précision de la taille.

Passive voice with 'was enhanced by'.

The study of liquid crystals has revolutionized the field of display technology.

L'étude des cristaux liquides a révolutionné le domaine de la technologie d'affichage.

Present perfect tense 'has revolutionized'.

The mineralogist identified the crystals based on their cleavage and luster.

Le minéralogiste a identifié les cristaux en se basant sur leur clivage et leur éclat.

Participial phrase 'based on' providing additional information.

The inherent symmetry of the crystals reflects the underlying quantum mechanical laws.

La symétrie inhérente des cristaux reflète les lois de la mécanique quantique sous-jacentes.

Complex subject with 'inherent' and 'underlying' as modifiers.

Piezoelectricity in certain crystals allows for the conversion of mechanical stress into voltage.

La piézoélectricité dans certains cristaux permet la conversion d'une contrainte mécanique en tension.

Technical explanation using 'allows for' and 'conversion of'.

The transition from an amorphous to a crystalline state involves a significant decrease in entropy.

La transition d'un état amorphe à un état cristallin implique une diminution significative de l'entropie.

Thermodynamic terminology used in a formal context.

The multifaceted nature of these crystals makes them ideal for light dispersion.

La nature multiforme de ces cristaux les rend idéaux pour la dispersion de la lumière.

Object complement 'ideal' following the object 'them'.

Crystallographic analysis revealed that the crystals belonged to the monoclinic system.

L'analyse cristallographique a révélé que les cristaux appartenaient au système monoclinique.

Noun clause 'that the crystals belonged...' as the object of 'revealed'.

The presence of impurities can drastically alter the color and conductivity of the crystals.

La présence d'impuretés peut modifier radicalement la couleur et la conductivité des cristaux.

Modal 'can' expressing possibility with an adverb.

The growth of protein crystals remains a bottleneck in structural biology research.

La croissance de cristaux de protéines reste un goulot d'étranglement dans la recherche en biologie structurale.

Metaphorical use of 'bottleneck' in a scientific context.

The aesthetic appeal of the crystals is secondary to their utility in high-precision optics.

L'attrait esthétique des cristaux est secondaire par rapport à leur utilité dans l'optique de haute précision.

Comparative structure 'is secondary to'.

Common Collocations

quartz crystals

ice crystals

salt crystals

liquid crystals

healing crystals

sugar crystals

snow crystals

clear crystals

microscopic crystals

raw crystals

Common Phrases

crystal clear

— Extremely easy to understand or see through.

The instructions were crystal clear.

crystal ball

— A glass globe used by fortune tellers to see the future.

I don't have a crystal ball to predict the stock market.

crystal wedding

— A 15th wedding anniversary.

They celebrated their crystal wedding anniversary with a party.

crystal palace

— A large building made primarily of glass and iron.

The Great Exhibition was held in a massive crystal palace.

crystal set

— An early type of radio receiver.

My grandfather used to listen to a crystal set.

rock crystal

— A clear, colorless variety of quartz.

The pendant was made of pure rock crystal.

crystal growth

— The process of atoms joining a crystal lattice.

The lab monitored the crystal growth over several weeks.

lead crystal

— Glass containing lead oxide, known for its sparkle.

The wine was served in fine lead crystal glasses.

crystal structure

— The unique arrangement of atoms in a crystal.

The crystal structure determines the mineral's hardness.

crystal healing

— An alternative medicine practice using stones.

She is a firm believer in the power of crystal healing.

Often Confused With

crystals vs glass

Glass is amorphous (disordered), while crystals are ordered.

crystals vs minerals

All crystals are minerals, but not all minerals are found as large crystals.

crystals vs gems

Gems are specifically crystals that are cut and polished for value.

Idioms & Expressions

"crystal clear"

— Completely transparent or obvious.

His intentions were crystal clear from the start.

neutral

"to look into a crystal ball"

— To try to predict the future.

Looking into my crystal ball, I see a promotion in your future.

informal

"crystal-gazing"

— The act of fortune-telling or speculative prediction.

Economists are doing a lot of crystal-gazing lately.

informal

"clear as crystal"

— Very easy to see or understand.

The water in the mountain stream was clear as crystal.

neutral

"shatter like crystal"

— To break easily and into many small pieces.

Her hopes shattered like crystal when she heard the news.

literary

"a crystal soul"

— Someone who is very pure and honest.

She was known as a crystal soul who never lied.

poetic

"crystal-clear water"

— Water that is perfectly transparent.

We swam in the crystal-clear water of the lagoon.

neutral

"to have a crystal-clear memory"

— To remember something perfectly.

I have a crystal-clear memory of our first meeting.

neutral

"crystal-clear logic"

— Reasoning that is very easy to follow.

The professor explained the theory with crystal-clear logic.

formal

"the crystal stair"

— A metaphor for an easy or perfect life (often used in the negative).

Life for me ain't been no crystal stair.

literary

Easily Confused

crystals vs crystalline

It's the adjective form.

'Crystals' is the noun; 'crystalline' describes the structure.

The substance has a crystalline structure.

crystals vs crystallize

It's the verb form.

'Crystals' are the objects; 'crystallize' is the action of forming them.

The sugar will crystallize as it cools.

crystals vs crystallography

It's the study of crystals.

'Crystals' are the subject; 'crystallography' is the science.

He is an expert in crystallography.

crystals vs chrystal

It's an old spelling.

'Crystals' is the correct modern spelling.

Don't use the spelling 'chrystal'.

crystals vs krystal

Used in branding.

'Crystals' is the standard English word.

Krystal is a brand, not a scientific term.

Sentence Patterns

I like [color] crystals.

I like purple crystals.

There are crystals in the [place].

There are crystals in the cave.

Crystals are used for [purpose].

Crystals are used for making jewelry.

The [noun] is made of [adjective] crystals.

The rock is made of microscopic crystals.

The formation of crystals depends on [factor].

The formation of crystals depends on the cooling rate.

Crystallographic studies of the crystals revealed [fact].

Crystallographic studies of the crystals revealed a cubic lattice.

She bought crystals to [verb].

She bought crystals to decorate her room.

If [condition], crystals will [verb].

If the water evaporates, crystals will form.

Word Family

Nouns

Verbs

Adjectives

How to Use It

frequency

Common in both daily life and specialized fields.

Common Mistakes

Using 'crystals clear' → crystal clear
The idiom 'crystal clear' always uses the singular form of 'crystal'.
Spelling it 'cristals' → crystals
In English, the word is spelled with a 'y', unlike in French or Spanish.
Calling glass 'crystals' in a lab → amorphous solid
In a scientific setting, calling glass a crystal is factually incorrect.
Saying 'the crystals is pretty' → the crystals are pretty
'Crystals' is a plural noun and requires a plural verb.
Confusing 'crystal' and 'crystalline' → crystalline structure
'Crystalline' is the adjective used to describe the state of being a crystal.

Tips

Use specific names

Instead of just saying 'crystals', try using specific names like 'quartz', 'amethyst', or 'salt' to sound more advanced.

Adjective vs Noun

Remember that 'crystal' can be an adjective (crystal bowl) or a noun (the crystals). Use the singular form when it's an adjective.

The 'Z' sound

Make sure the 's' at the end of 'crystals' sounds like a 'z'. This is common for plural nouns ending in a voiced sound.

Idiomatic use

Use 'crystal clear' to describe something very easy to understand. It's a very common and useful idiom in English.

Internal order

In a science context, always remember that 'crystals' implies 'order'. If there is no order, it's not a crystal.

Watch the 'Y'

The word is spelled with a 'y' (crystals), not an 'i' (cristals). This is a common mistake for speakers of Romance languages.

Context matters

In a jewelry store, 'crystal' means sparkle. In a lab, 'crystal' means structure. Always check your environment.

Visual Cues

Think of a snowflake. It's the most perfect example of a natural crystal that everyone knows.

Countability

Use 'crystals' for the individual pieces you can count, and 'crystal' for the material itself.

Compound words

Practice saying 'liquid crystal display' or 'quartz crystal' to get used to the word in technical phrases.

Memorize It

Mnemonic

Think of 'CRISp' and 'TALl'. Crystals often have crisp, sharp edges and can grow tall and straight.

Visual Association

Imagine a snowflake or a grain of salt under a microscope; the perfect squares or hexagons represent the word.

Word Web

Quartz Salt Diamond Snowflake Lattice Symmetry Jewelry Science

Challenge

Try to find three things in your house that are made of crystals (hint: check the kitchen and the bathroom).

Word Origin

Derived from the Old French 'cristal', which comes from the Latin 'crystallum', and ultimately from the Greek 'krystallos'.

Original meaning: The Greek word 'krystallos' originally meant 'ice' or 'rock crystal'.

Indo-European (Greek -> Latin -> French -> English).

Cultural Context

Be aware that 'crystal' is also a slang term for crystal methamphetamine; context is important to avoid confusion.

In the UK and US, 'crystal' is a common female name, peaking in popularity in the 1980s.

The Crystal Palace (London) The Dark Crystal (film) Crystal Blue Persuasion (song)

Practice in Real Life

Real-World Contexts

Geology

mineral crystals
crystal lattice
igneous crystals
metamorphic crystals

Jewelry

faceted crystals
swarovski crystals
raw crystals
polished crystals

Cooking

salt crystals
sugar crystals
crystallized ginger
honey crystals

Technology

liquid crystals
quartz crystals
silicon crystals
crystal oscillator

Spirituality

healing crystals
charging crystals
cleansing crystals
crystal energy

Conversation Starters

"Have you ever collected any interesting crystals or rocks?"

"Do you think crystals have any special powers, or are they just pretty?"

"What's the biggest crystal you've ever seen in a museum?"

"Do you prefer raw, natural crystals or polished gemstones?"

"Have you ever tried growing your own sugar crystals at home?"

Journal Prompts

Describe the most beautiful crystal you have ever seen. What did it look like?

If you could have a room filled with one type of crystal, which would it be and why?

Write about a time you found something 'crystal clear' after being confused.

Research how snowflakes form and write a paragraph about ice crystals.

Discuss the difference between a diamond and a piece of salt.

Frequently Asked Questions

10 questions

Most rocks are made of crystals, but some, like obsidian (volcanic glass), are amorphous and have no crystals. In many rocks, the crystals are too small to see without a microscope.

The main difference is the internal structure. Crystals have atoms arranged in a perfect, repeating pattern, while glass has atoms scattered randomly. This is why crystals often have flat faces and glass does not.

Yes, you can easily grow crystals at home using common substances like sugar, salt, or alum. By dissolving them in hot water and letting the water cool or evaporate, the crystals will begin to form on a string or at the bottom of the container.

The color of a crystal is usually caused by small amounts of impurities (other elements) trapped inside the lattice. For example, quartz is clear, but with a little iron, it becomes purple amethyst.

Lead crystal is a type of high-quality glass that contains lead oxide. The lead makes the glass heavier and increases its ability to bend light, which gives it more sparkle than regular glass.

Crystals form when a liquid cools into a solid or when a liquid evaporates. For example, magma cooling underground forms granite crystals, and evaporating seawater forms salt crystals.

Yes, diamonds are crystals made of pure carbon atoms arranged in a very strong, cubic pattern. This structure is what makes diamonds the hardest natural material on Earth.

Liquid crystals are a state of matter between a liquid and a solid. They flow like a liquid but their molecules are oriented in an orderly way like a crystal. They are used in LCD screens.

There is no scientific evidence that crystals have healing powers. Their use in 'crystal healing' is considered a pseudoscience, although many people find them helpful for meditation or as symbolic objects.

A crystal lattice is the invisible 3D grid that shows where the atoms are located in a crystal. It is the 'skeleton' of the crystal's structure.