gemstone
Clear Quartz (Faceted)
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale. Color: Colorless (transparent). Luster: Vitreous. Crystal structure: Trigonal. Cleavage: Indistinct. Specific gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Colorless (transparent)
- Luster
- Vitreous
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Physical properties
Hardness: 7 on Mohs scale. Color: Colorless (transparent). Luster: Vitreous. Crystal structure: Trigonal. Cleavage: Indistinct. Specific gravity: 2.65.
Formation & geological history
Forms in igneous, metamorphic, and sedimentary rocks. Typically crystallizes from silica-rich solutions in hydrothermal veins or pegmatites.
Uses & applications
Used in jewelry, electronics (oscillators), optics, glassmaking, and as a collectible or decorative object.
Geological facts
Clear quartz is sometimes known as 'rock crystal'. It is the most abundant and widely distributed mineral found at Earth's surface.
Field identification & locations
Identified by its hardness (scratches glass), lack of cleavage, and conchoidal fracture. Often found worldwide. Collectors look for clarity and quality of facets when cut.
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