mineral
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
Mohs hardness of 7, transparent to translucent clarity, vitreous (glassy) luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
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Physical properties
Mohs hardness of 7, transparent to translucent clarity, vitreous (glassy) luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
Formation & geological history
Forms in hydrothermal veins, pegmatites, and igneous rocks through crystallization of silica-rich fluids under high pressure and temperature
Uses & applications
Used in electronics (piezoelectric applications), glass manufacturing, optical equipment, jewelry, and gemstone collecting
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and is renowned for its ability to generate an electric charge under mechanical stress (piezoelectric effect)
Field identification & locations
Identified by its scratch hardness (scratches glass), glass-like appearance, and lack of true cleavage. Found worldwide in nearly all geological environments
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