mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 on the Mohs scale. Color: Milky white to translucent white due to microscopic fluid inclusions. Luster: Vitreous to greasy. Crystal structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.
- Hardness
- 7 on the Mohs scale
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on the Mohs scale. Color: Milky white to translucent white due to microscopic fluid inclusions. Luster: Vitreous to greasy. Crystal structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.
Formation & geological history
Forms from hydrothermal solutions, cooling magma, and metamorphic processes, precipitating in veins or cavities within various rock types over geological time scales.
Uses & applications
Used in gemstone collection, decorative items, lapidary art, and historically in glassmaking and abrasives.
Geological facts
Milky quartz is the most common variety of the quartz family and can be found globally in almost every geological environment.
Field identification & locations
Easily identified by its milky white appearance, vitreous luster, lack of cleavage, and high hardness which easily scratches glass. Found worldwide.
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