mineral
Milky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale); Color: White, milky, or cloud-like; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.
- Hardness
- 7 (Mohs scale)
- Color
- White, milky, or cloud-like
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 (Mohs scale); Color: White, milky, or cloud-like; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and igneous rocks through the cooling of silica-rich fluids. It is found in diverse geological environments across all ages.
Uses & applications
Used in glassmaking, abrasives, silicon production, and as an ornamental stone in landscaping or low-cost jewelry (beads/cabochons).
Geological facts
The milky white color is caused by tiny inclusions of liquid or gas trapped during the crystal's growth. It is one of the most abundant minerals on Earth's surface.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and characteristic milky-white opacity. Commonly found in gravel, riverbeds, and mountainous regions.
