sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white or off-white in color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or off-white in color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of around 2.65.
Formation & geological history
Formed through the weathering and prolonged water-transport of larger quartz veins or igneous rocks like granite, typically found in stream beds, beaches, and alluvial deposits.
Uses & applications
Used in landscaping, decorative stone, abrasive manufacturing, and as a raw material for glass and silicon production.
Geological facts
Quartz is one of the most abundant and durable minerals on Earth's continental crust, which is why quartz pebbles often outlive other rock types during erosion processes.
Field identification & locations
Easily identified by its high hardness (scratches glass), smooth rounded shape from water tumbling, and lack of reaction to acid. Commonly found worldwide in gravel bars and beaches.
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Quartz pebble
Silicon dioxide (SiO2)
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