sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically translucent to opaque, vitreous to waxy luster, conchoidal fracture, and specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically translucent to opaque, vitreous to waxy luster, conchoidal fracture, and specific gravity of 2.65.
Formation & geological history
Formed through the mechanical weathering and water-borne transport of quartz veins or parent rocks, often smoothed by wave or river action over long periods.
Uses & applications
Used in landscaping, decorative stone, and as a raw material for various industrial applications and tumbling.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is extremely resistant to weathering, which is why it often survives as pebbles in rivers and beaches.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and smooth water-worn shape found frequently in riverbeds and gravel bars worldwide.
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