sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white or translucent with vitreous luster, conchoidal fracture, and no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or translucent with vitreous luster, conchoidal fracture, and no true cleavage.
Formation & geological history
Formed through the weathering and prolonged water-trolling (river or wave action) of quartz-bearing parent rocks over thousands to millions of years.
Uses & applications
Used in landscaping, decorative gravel, and lapidary work.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, making it extremely resistant to chemical and mechanical weathering.
Field identification & locations
Found worldwide in riverbeds, beaches, and alluvial deposits; easily identifiable by its high hardness (scratches glass) and smooth, water-worn shape.
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