mineral
Quartz (Milky/Rose Quartz)
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Off-white to pale pink/tan; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Off-white to pale pink/tan
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: Off-white to pale pink/tan; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and igneous rocks through the cooling and precipitation of silica-rich fluids.
Uses & applications
Widely used in jewelry, decorative carvings, landscaping, glassmaking, electronics (piezoelectric properties), and lapidary art.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'Quarz' which is of Slavic origin.
Field identification & locations
Identified by its scratch hardness (can scratch glass), lack of cleavage, and translucent milky appearance. Commonly found worldwide in stream beds, gravels, and igneous rock formations.
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