mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Hardness: 7.0 Mohs; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65
- Hardness
- 7
- Color
- Milky white to translucent
- Luster
- Vitreous to greasy
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Explore Quartz (Milky Quartz) in the encyclopedia →Identify your own rocks.
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Physical properties
Hardness: 7.0 Mohs; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65
Formation & geological history
Formed through hydrothermal processes, crystallization from magma, or within metamorphic rocks. It is found across all geological eras in various environments.
Uses & applications
Used in glass manufacturing, electronics (due to piezoelectric properties), construction aggregates, as semi-precious gemstones, and in abrasive applications.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz gets its appearance from tiny fluid inclusions of gas or liquid trapped during crystal growth.
Field identification & locations
Identify in the field by its hardness (it scratches glass) and lack of cleavage. It is found globally, particularly in vein deposits and pegmatites.
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Metamorphic
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Mineral
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Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
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