mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: White to cloudy; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- White to cloudy
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: White to cloudy; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.
Formation & geological history
Formed from the cooling of silica-rich magma in hydrothermal veins or as a secondary mineral in various rock types. The white color is caused by tiny inclusions of gas or liquid trapped during crystal growth.
Uses & applications
Used in glass manufacturing, electronics (due to piezoelectric properties), abrasives, and as decorative stone or landscaping material.
Geological facts
Quartz is the second most abundant mineral in the Earth's continental crust. Milky quartz is the most common variety of quartz found globally.
Field identification & locations
Identify by its ability to scratch glass (hardness 7), lack of cleavage, and characteristic waxy or vitreous luster. It is common in mountain ranges and riverbeds.
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