mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectMohs hardness: 7; Color: Milky white to opaque; Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7
- Color
- Milky white to opaque
- Luster
- Vitreous to greasy
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Physical properties
Mohs hardness: 7; Color: Milky white to opaque; Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed through the cooling of silica-rich hydrothermal veins or magma in igneous and metamorphic environments. The white color is caused by microscopic fluid inclusions of gas or liquid trapped during crystal growth.
Uses & applications
Used in glass manufacturing, electronics (piezoelectric properties), abrasives, construction aggregates, and occasionally as a gemstone or for decorative landscaping.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz found worldwide.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and characteristic waxy-to-glassy luster. Frequently found in mountain ranges, riverbeds, and as veins in larger rock bodies.
