mineral
Quartz (Clear Quartz Point)
Silicon Dioxide (SiO2)
Mohs hardness of 7, vitreous (glass-like) luster, hexagonal crystal system, trigonal crystal class, conchoidal fracture, colorless to milky white transparency with internal veil inclusions, specific gravity ~2.65.
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Physical properties
Mohs hardness of 7, vitreous (glass-like) luster, hexagonal crystal system, trigonal crystal class, conchoidal fracture, colorless to milky white transparency with internal veil inclusions, specific gravity ~2.65.
Formation & geological history
Formed in igneous pegmatites, hydrothermal veins, and metamorphic rocks where silica-rich fluids cool and crystallize under specific pressure and temperature conditions over geological timescales.
Uses & applications
Widely used in electronics (piezoelectric applications), optics, glassmaking, abrasive industries, gemstone carving, lapidary arts, and highly favored as mineral specimens for collectors.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Pure clear quartz is historically known as 'rock crystal', which ancient Greeks believed was permanently frozen ice ('krystallos').
Field identification & locations
Identified by its distinctive six-sided prism shape ending in hexagonal pyramids, high hardness (scratches glass readily), and glassy luster. Found globally in places like Arkansas (USA), Brazil, and Madagascar.
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