mineral
Milky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Milky white to translucent; 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 translucent
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal / Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Forms in hydrothermal veins, pegmatites, and various igneous, metamorphic, and sedimentary rocks when silica-rich fluids cool and crystallize, trapping tiny gas or liquid bubbles that cause the milky white appearance.
Uses & applications
Used in manufacturing quartz glass, electronics (piezoelectric applications), abrasives, ceramics, and popular as an ornamental stone and mineral specimen for collectors.
Geological facts
The milky white color is caused by microscopic fluid inclusions (tiny pockets of gas or liquid) trapped inside the crystal structure during its formation millions of years ago.
Field identification & locations
Can be identified by its milky white translucence, glass-like luster, lack of cleavage, and ability to easily scratch glass (hardness 7). Commonly found worldwide in granitic environments and gravel deposits.
