mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Hardness: 7 on Mohs scale; Color: White to translucent with brown iron staining; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (Trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- White to translucent with brown iron staining
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: White to translucent with brown iron staining; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (Trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Forms in hydrothermal veins or as a major constituent in igneous and metamorphic rocks. This specimen likely originated from a pegmatite or hydrothermal vein where silicon-rich fluids crystallized over millions of years.
Uses & applications
Used in electronics for its piezoelectric properties, as an abrasive in glassmaking, and in landscaping or as a collector's specimen.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz gets its cloudy appearance from tiny inclusions of fluids or gas trapped during crystal growth.
Field identification & locations
Identify in the field by its ability to scratch glass and lack of cleavage. It is found globally, particularly in mountainous regions and riverbeds.
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mineral