mineral
Milky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7; white to translucent; vitreous (glassy) luster; hexagonal (trigonal) crystal system; conchoidal fracture; no cleavage; specific gravity of 2.65.
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Physical properties
Mohs hardness of 7; white to translucent; vitreous (glassy) luster; hexagonal (trigonal) crystal system; conchoidal fracture; no cleavage; specific gravity of 2.65.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and igneous rocks through the cooling of silica-rich fluids. It can be found in rocks from virtually all geological ages.
Uses & applications
Used in the manufacturing of glass, ceramics, and abrasives. Also used in construction aggregate and as a collector's specimen. High-purity quartz is essential for making silicon chips and solar panels.
Geological facts
The milky appearance is caused by tiny inclusions of gas or liquid trapped during the crystal's growth. It is the most common variety of crystalline quartz.
Field identification & locations
Identified by its ability to scratch glass, its white color, and lack of cleavage planes. Found abundantly in mountain ranges, riverbeds, and as veins in metamorphic and igneous terrains.
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