mineral
Quartz Crystal
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, varies in color from colorless to brown or gray, vitreous luster, hexagonal crystal system, no cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, varies in color from colorless to brown or gray, vitreous luster, hexagonal crystal system, no cleavage, specific gravity of 2.65.
Formation & geological history
Formed in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks, often precipitating from hydrothermal solutions.
Uses & applications
Used in electronics, watches, glassmaking, abrasives, and as a semi-precious gemstone or collector specimen.
Geological facts
Quartz is one of the most abundant and widely distributed minerals on Earth's continental crust.
Field identification & locations
Easily identified by its hardness and lack of cleavage; found worldwide in veins, pegmatites, and sedimentary deposits.
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Potassium Feldspar (Orthoclase)
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mineral