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: Hexagonal/Trigonal; 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: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments, most commonly from hydrothermal veins or as a constituent of granite. The milky opacity is caused by microscopic fluid inclusions of gas or liquid trapped during crystal growth.
Uses & applications
Used in the glass and ceramics industry, as an abrasive, in construction as aggregate, and as a semi-precious gemstone in jewelry or for metaphysical collecting.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often found in massive vein deposits and is frequently associated with gold deposits.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and waxy luster. Common worldwide, especially in mountainous regions and quartz veins within granite outcrops.
