mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, clear to brownish-white color, vitreous luster, hexagonal crystal system, no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, clear to brownish-white color, vitreous luster, hexagonal crystal system, no true cleavage, specific gravity of 2.65.
Formation & geological history
Forms from hydrothermal solutions or silica-rich fluids cooling and precipitating within cavities in rocks over millions of years.
Uses & applications
Used in electronics, watches, glassmaking, ornamental objects, and crystal collections.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties.
Field identification & locations
Easily identified by its distinct crystal habit and high hardness which can scratch glass. Common worldwide in nearly all geological environments.
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