sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, translucent to opaque, vitreous luster, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, translucent to opaque, vitreous luster, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed via weathering and fluvial erosion of parent rocks, rounded through transport in riverbeds or beaches over geological timescales.
Uses & applications
Used in landscaping, decorative gravel, grit manufacturing, and sometimes as tumbled pocket stones for collectors.
Geological facts
Quartz is one of the most durable and abundant minerals on Earth's surface, resisting chemical weathering that destroys other minerals.
Field identification & locations
Found globally in riverbeds, beaches, and sedimentary conglomerates; identified easily by its high hardness scratching glass.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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