mineral
Quartz Vein / Quartz Matrix
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale. Color: Milky white to translucent pale orange/tan due to iron oxide staining. Luster: Vitreous to greasy. Crystal structure: Trigonal/Hexagonal. Fracture: Conchoidal to uneven. Specific gravity: ~2.65.
- Hardness
- 7 on Mohs scale
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale. Color: Milky white to translucent pale orange/tan due to iron oxide staining. Luster: Vitreous to greasy. Crystal structure: Trigonal/Hexagonal. Fracture: Conchoidal to uneven. Specific gravity: ~2.65.
Formation & geological history
Formed through hydrothermal processes where silica-rich fluids cooled and crystallized within fractures and fissures in host rock matrix, often associated with metamorphic or igneous environments.
Uses & applications
Used in glassmaking, electronics (piezoelectric crystals), abrasives, construction aggregates, and widely collected as raw mineral specimens.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Vein quartz often acts as an indicator mineral for precious metals like gold and silver in economic geology.
Field identification & locations
Identified by its hardness (scratches glass), glass-like vitreous luster, lack of distinct cleavage, and milky to clear crystalline appearance. Found globally in almost all geological settings.
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Mineral
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Mineral/Rock