mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Hardness: 7 on Mohs scale; Color: Milky white to pale pink; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Milky white to pale pink
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: Milky white to pale pink; 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 magma or from hydrothermal veins. The white color is caused by microscopic fluid inclusions of gas or liquid trapped during the crystal's growth.
Uses & applications
Used in glassmaking, abrasives, electronics (due to piezoelectric properties), and as decorative gravel or low-cost lapidary material.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz found in nature.
Field identification & locations
Identifiable by its white color, lack of cleavage, and ability to easily scratch glass. Commonly found in riverbeds, gravel pits, and mountain veins worldwide.
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