mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white or colorless with vitreous to greasy luster, hexagonal crystal system, conchoidal fracture with no true cleavage, and a specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or colorless with vitreous to greasy luster, hexagonal crystal system, conchoidal fracture with no true cleavage, and a specific gravity of 2.65.
Formation & geological history
Forms in a wide variety of geological environments including igneous, metamorphic, and sedimentary rocks, often precipitating from hydrothermal veins or crystallizing from silica-rich magma.
Uses & applications
Used widely in glassmaking, electronics, oscillators, gemstones, abrasive materials, and ornamental carvings.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electric charge under mechanical stress.
Field identification & locations
Easily identified in the field by its high hardness (scratches glass easily), lack of cleavage, and characteristic conchoidal fracture. Found worldwide.
