mineral
Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, clear to milky white or gray in color, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, clear to milky white or gray in color, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Forms in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks, often precipitated from silica-rich hydrothermal solutions.
Uses & applications
Used in electronics, glassware, abrasive materials, gemstone carving, and spiritual or metaphysical collections.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge when compressed.
Field identification & locations
Identified by its high hardness (scratches glass), conchoidal fracture, and lack of cleavage. Found worldwide in almost all types of rock formations.
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Schist
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Septarian Pebble
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sedimentary
Potassium Feldspar (Orthoclase)
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