mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal (hexagonal prisms); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Milky white to translucent
- Luster
- Vitreous (glassy) to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal (hexagonal prisms); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.
Formation & geological history
Formed from silica-rich hydrothermal solutions cooling in veins, or within igneous pegmatites. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.
Uses & applications
Used in glassmaking, abrasives, electronics (piezoelectric properties), landscaping, and as semi-precious gemstones for jewelry or metaphysical collecting.
Geological facts
Quartz is one of the most abundant minerals in Earth's crust. Milky quartz specifically is white because of microscopic 'bubbles' trapped during formation, acting like frosted glass.
Field identification & locations
Identify in the field by its hardness (will scratch glass and steel), lack of cleavage, and typical white appearance. Found globally in almost all geological environments.
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