mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, clear to white color, vitreous 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, clear to white color, vitreous luster, hexagonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and as a secondary mineral in sedimentary environments from silica-rich aqueous solutions.
Uses & applications
Used in electronics, oscillators, glassmaking, abrasives, gemstone carving, and mineral collections.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and distinct hexagonal crystal habit. Found worldwide.
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