sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, gray, or tan color, vitreous to dull luster, cryptocrystalline or macrocrystalline quartz structure, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, gray, or tan color, vitreous to dull luster, cryptocrystalline or macrocrystalline quartz structure, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed through mechanical weathering and aqueous transport of primary quartz-bearing rocks, often rounded over long periods in riverbeds or marine environments.
Uses & applications
Used in landscaping, decorative aggregates, and occasionally tumbled for lapidary crafts.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Found worldwide in stream beds, beaches, and alluvial gravel deposits. Identified by its high hardness (scratches glass) and lack of cleavage.
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Quartz pebble
Silicon dioxide (SiO2)
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