mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, hexagonal crystal system, and lack of cleavage with conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, hexagonal crystal system, and lack of cleavage with conchoidal fracture.
Formation & geological history
Forms from cooling magma in igneous rocks or via precipitation from silica-rich hydrothermal solutions in crustal veins.
Uses & applications
Used widely in glassmaking, electronics, oscillators, abrasives, and as a popular gemstone or mineral specimen.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and exhibits piezoelectric properties.
Field identification & locations
Easily identified by its distinct hexagonal crystal habit, high hardness, and resistance to scratching by a steel knife.
