sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale. Color: Off-white to light tan, translucent to opaque. Luster: Dull to vitreous. Structure: Trigonal crystal system, rounded by erosion.
- Hardness
- 7 on Mohs scale
- Color
- Off-white to light tan, translucent to opaque
- Luster
- Dull to vitreous
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Physical properties
Hardness: 7 on Mohs scale. Color: Off-white to light tan, translucent to opaque. Luster: Dull to vitreous. Structure: Trigonal crystal system, rounded by erosion.
Formation & geological history
Formed through mechanical weathering and stream or beach erosion of quartz-bearing rocks like granite or quartzite.
Uses & applications
Commonly used in landscaping, river rock aggregate, aquariums, and decorative gravel.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust and is extremely resistant to chemical and physical weathering.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and smooth rounded pebble morphology. Found in stream beds, riverbanks, and beaches worldwide.
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Fossiliferous Sedimentary Rock
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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