mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 on the Mohs scale. Color: White, milky, translucent to opaque. Luster: Vitreous to greasy. Crystal system: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.
- Hardness
- 7 on the Mohs scale
- Color
- White, milky, translucent to opaque
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on the Mohs scale. Color: White, milky, translucent to opaque. Luster: Vitreous to greasy. Crystal system: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and metamorphic environments as silica-rich fluids cool and crystallize under varying temperatures and pressures.
Uses & applications
Used in landscaping, decorative stone, glass manufacturing, and as a popular specimen for mineral collectors.
Geological facts
Milky quartz is the most common variety of crystalline quartz found on Earth. Its milky appearance is caused by microscopic fluid or gas inclusions trapped during crystal growth.
Field identification & locations
Easily identified by its hardness (scratches glass), white milky color, and lack of cleavage. Found worldwide in almost all geological environments.
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