mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Translucent white to light tan; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Translucent white to light tan
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Translucent white to light tan; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Formed through hydrothermal processes or crystallization from cooling magma. This particular specimen is a water-worn river or beach pebble, shaped by erosion over centuries to millions of years.
Uses & applications
Used in glassmaking, electronics (piezoelectric properties), abrasives, and as a decorative garden stone or tumbled pocket stone.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'Quarz', which has Slavic origins meaning 'hard'.
Field identification & locations
Identify in the field by its hardness (will scratch glass), lack of cleavage, and translucent appearance. Found globally in riverbeds, beaches, and soil.
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