mineral
Quartz (White/Milky Quartz)
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, white or milky color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, white or milky color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Forms in a wide variety of geological environments, commonly crystallizing from silica-rich hydrothermal veins and magma chambers, as well as precipitating in sedimentary environments.
Uses & applications
Used in glassmaking, abrasives, electronics, oscillators, gemstones, and mineral specimens for collections.
Geological facts
Quartz is one of the most abundant and widely distributed minerals found on Earth's continental crust. Milky quartz gets its white color from microscopic fluid inclusions trapped during crystal growth.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found globally.
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