mineral
Raw Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, clear, or light brown in raw form, vitreous to greasy luster, hexagonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, clear, or light brown in raw form, vitreous to greasy luster, hexagonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Forms in virtually all environments—igneous, metamorphic, and sedimentary—often crystallizing from silica-rich hydrothermal veins and pegmatites over millions of years.
Uses & applications
Used in electronics, watchmaking, glass manufacturing, abrasives, and as a popular specimen for gemstone carving and mineral collectors.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust, following feldspar. Its piezoelectric properties make it essential for precise frequency control in electronics.
Field identification & locations
Easily identified by its hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found worldwide in nearly every geological setting.
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Schist
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Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral