mineral
Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, vitreous luster, transparent to translucent, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, transparent to translucent, 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 crystallizing from hydrothermal solutions or silica-rich magmas.
Uses & applications
Used in electronics, watches, glassmaking, abrasives, and as a popular gemstone or specimen for collectors.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it generates an electric charge under mechanical stress.
Field identification & locations
Easily identified by its hardness (scratches glass), conchoidal fracture, and lack of cleavage. Found worldwide in almost every geological setting.
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