mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Translucent yellowish-white; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture.
- Hardness
- 7 on Mohs scale
- Color
- Translucent yellowish-white
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Translucent yellowish-white; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed from silica-rich hydrothermal fluids or within igneous and metamorphic rocks. This specific specimen is a water-worn river pebble, likely shaped by alluvial processes over thousands of years.
Uses & applications
Used in construction, glassmaking, electronics (piezoelectric properties), and as decorative landscaping stone or low-end jewelry (tumble stones).
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 by its hardness (it will scratch glass) and lack of cleavage. Commonly found in river beds, beaches, and soil worldwide.
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