mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: White/Opaque, Luster: Vitreous to greasy, Crystal structure: Trigonal, Cleavage: Indistinct/Conchoidal fracture, Specific gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White/Opaque, Luster: Vitreous to greasy, Crystal structure: Trigonal, Cleavage: Indistinct/Conchoidal fracture, Specific gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or as a constituent of igneous rocks like granite. The milky white color is caused by microscopic fluid inclusions of gas or liquid trapped during crystal growth.
Uses & applications
Used in glassmaking, abrasives, electronics (piezoelectric properties), landscaping, and as a collector mineral or gemstone.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz can sometimes be a 'host rock' for gold in hydrothermal veins.
Field identification & locations
Identified by its white color, inability to be scratched by steel, and conchoidal fracture. Found worldwide in nearly all geological environments.
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Sandstone with Mineral Veining or Crust
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