mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Hardness: 7 (Mohs scale), Color: White to translucent cloudy, Luster: Vitreous to greasy, Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White to translucent cloudy, 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 milky appearance is caused by tiny fluid or gas inclusions trapped during crystal growth. Found in various geological ages and environments.
Uses & applications
Used in glass manufacturing, electronics (due to piezoelectric properties), construction aggregates, and occasionally as minor gemstones or decorative landscaping stones.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of crystalline quartz found in nature.
Field identification & locations
Identify in the field by its hardness (scratches glass), lack of cleavage, and white opaque color. It is ubiquitous globally, often found in mountain ranges, pebble beaches, and stream beds.
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Mineral/Rock
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Biotite Schist
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