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    CategorySilicate mineral
    Formula (repeating unit)SiO₂
    Wikipedia
    https://en.wikipedia.org/wiki/Quartz

    Quartz - Wikipedia

    • Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally a… See more

    Etymology

    The word "quartz" is derived from the German word Quarz, which had the same form in the first half of the 14th century in Middle High German and in East Central German and which came from the Polish dialect ter… See more

    Early studies

    Roman naturalist Pliny the Elder believed quartz to be water ice, permanently frozen after great lengths of time. He supported this idea by saying that quartz is found near glaciers in the Alps, but not on volcanic mountains, … See more

    Crystal habit and structure

    Quartz belongs to the trigonal crystal system at room temperature, and to the hexagonal crystal system above 573 °C (846 K; 1,063 °F). The ideal crystal shape is a six-sided prism terminating with six-sided pyramid-like … See more

    Varieties (according to color)

    Pure quartz, traditionally called rock crystal or clear quartz, is colorless and transparent or translucent and has often been used for hardstone carvings, such as the Lothair Crystal. Common colored varieties include citrine, ros… See more

    Piezoelectricity

    Quartz crystals have piezoelectric properties; they develop an electric potential upon the application of mechanical stress. Quartz's piezoelectric properties were discovered by Jacques and Pierre Curie in 1880. … See more

    Occurrence

    Quartz is a defining constituent of granite and other felsic igneous rocks. It is very common in sedimentary rocks such as sandstone and shale. It is a common constituent of schist, gneiss, quartzite and other … See more

    Mining

    Quartz is extracted from open pit mines. Miners occasionally use explosives to expose deep pockets of quartz. More frequently, bulldozers and backhoes are used to remove soil and clay and expose quartz veins, whic… See more

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    Table of Contents
    Quick Facts
    Etymology
    Early studies
    Crystal habit and structure
    Varieties (according to color)
    Piezoelectricity
    Occurrence
     
  1. Britannica
    https://www.britannica.com/science/quartz

    Quartz | Definition, Types, Uses, & Facts | Britannica

  2. Wikipedia
    https://en.wikipedia.org/wiki/Quartz_clock

    Quartz clock - Wikipedia

  3. Wikipedia
    https://en.wikipedia.org/wiki/Smoky_quartz

    Smoky quartz - Wikipedia

  4. Geology.com
    https://geology.com/minerals/quartz.shtml

    Quartz Mineral | Photos, Uses, Properties, Pictures - Geology.com

  5. Geology Science
    https://geologyscience.com/minerals/qu…

    Quartz | Properties, Varieties, Occurrence and Uses

    Jul 1, 2024 · Quartz is one of the most abundant minerals in the Earth’s crust and can be found in many different geological settings. One of the most common settings for quartz formation is in igneous rocks, such as granite, where it can …

  6. quartz
    noun
    1. a hard white or colorless mineral consisting of silicon dioxide, found widely in igneous, metamorphic, and sedimentary rocks. It is often colored by impurities (as in amethyst, citrine, and cairngorm).
    More about quartz
  7. Wikipedia
    https://en.wikipedia.org/wiki/Quartzite

    Quartzite - Wikipedia

    Quartzite is a very hard rock composed predominantly of an interlocking mosaic of quartz crystals. The grainy, sandpaper-like surface is glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate …

  8. Rock Chasing
    https://rockchasing.com/types-of-quartz

    The 24 Different Types Of Quartz (With Photos) - Rock …

    Jan 19, 2024 · Quartz is one of the most common and varied minerals on Earth, found in many different forms. Agate, amethyst, and Faden quartz are just a few examples of the types of quartz that exist. Not only is quartz fascinating for its …

  9. Wikipedia
    https://simple.wikipedia.org/wiki/Quartz

    Quartz - Simple English Wikipedia, the free encyclopedia

    Quartz is a common mineral in Earth's crust with many varieties and uses. Learn about its crystal structure, properties, types, and shocked quartz as evidence of a meteor impact.

  10. Wiktionary
    https://en.wiktionary.org/wiki/quartz

    quartz - Wiktionary, the free dictionary

    Aug 15, 2024 · quartz (countable and uncountable, plural quartzes) (mineralogy) The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, Si O 2. It occurs in a variety of forms, both crystalline and …

  11. People also ask
    Is quartz a mineral?
    Quartz, widely distributed mineral of many varieties that consists primarily of silica, or silicon dioxide. Minor impurities such as lithium, sodium, potassium, and titanium may be present. Quartz has great economic importance. Learn more about quartz in this article.

    Quartz | Definition, Types, Uses, & Facts | Britannica

    britannica.com
    What is the chemical composition of quartz?
    Quartz is a mineral composed of silicon and oxygen, with a chemical composition of SiO 2. It is the most abundant mineral in Earth's crust and is resistant to both chemical and physical weathering. When rocks weather away, the residual material usually contains quartz. This is why the sand at most of the world's beaches is quartz. What is Quartz?

    Quartz Mineral | Photos, Uses, Properties, Pictures - Geology.com

    geology.com
    Where does quartz come from?
    Get a special academic rate on Britannica Premium. China, Japan, and Russia are the world’s primary producers of quartz. Belgium, Brazil, Bulgaria, France, Germany, South Africa, and the United Kingdom also mine significant quantities of the mineral. For detailed physical properties, see silica mineral (Click Here to see full-size table table).

    Quartz | Definition, Types, Uses, & Facts | Britannica

    britannica.com
    Why is quartz called a crystal?
    Quartz has attracted attention from the earliest times; water-clear crystals were known to the ancient Greeks as krystallos —hence the name crystal, or more commonly rock crystal, applied to this variety. The name quartz is an old German word of uncertain origin first used by Georgius Agricola in 1530. A brief treatment of quartz follows.

    Quartz | Definition, Types, Uses, & Facts | Britannica

    britannica.com
    How does quartz form?
    Additionally, quartz can form as a result of biomineralization, which is the process by which living organisms produce minerals. For example, some types of plankton and diatoms are known to produce their skeletons and cell walls out of silica, which is the main component of quartz.

    Quartz | Properties, Varieties, Occurrence and Uses - Geology Science

    geologyscience.com
    What does Quarz mean?
    A quartz crystal. From German Quarz, from Middle High German (Central East German) quarz, twarc, from a West Slavic language [compare Polish twardy (“hard”), Czech tvrdý (“hard”) ], from Proto-Slavic *tvьrdъ . ( mineralogy) The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, Si O 2.

    quartz - Wiktionary, the free dictionary

    en.wiktionary.org
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