mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Hardness: 7 on Mohs scale; Color: Opaque white; Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Opaque white
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: Opaque white; Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Forms in hydrothermal veins, pegmatites, and as a primary mineral in igneous rocks like granite. The white color is caused by tiny liquid or gas inclusions trapped during crystal growth.
Uses & applications
Used in glassmaking, abrasives, electronics (piezoelectric properties), and as decorative landscaping stone or ornamental material.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz specifically is white due to 'fluid inclusions' trapped during its formation millions of years ago.
Field identification & locations
Look for a glassy white appearance that can scratch glass. It is commonly found in gravel beds, near gold deposits, or as veins within larger rock outcrops worldwide.
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Mineral/Rock
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Green Apatite on Albite
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mineral