sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale. Color: Off-white to pale tan. Luster: Dull to vitreous. Crystal structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific gravity: ~2.65.
- Hardness
- 7 on Mohs scale
- Color
- Off-white to pale tan
- Luster
- Dull to vitreous
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Physical properties
Hardness: 7 on Mohs scale. Color: Off-white to pale tan. Luster: Dull to vitreous. Crystal structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific gravity: ~2.65.
Formation & geological history
Formed through weathering, erosion, and stream transport of silica-rich rocks, resulting in rounded water-worn pebbles.
Uses & applications
Used in construction aggregate, landscaping, decorative stone, and as raw material for silica extraction.
Geological facts
Quartz is one of the most abundant minerals on Earth's surface and is highly resistant to both chemical and mechanical weathering.
Field identification & locations
Identified by its high hardness (scratches glass), smooth water-worn surface, light color, and lack of distinct cleavage. Common in riverbeds, beaches, and gravel deposits worldwide.
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