mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white to off-white color, vitreous to greasy luster, trigonal crystal system, no true cleavage with conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, white to off-white color, vitreous to greasy luster, trigonal crystal system, no true cleavage with conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed via crystallization in igneous, metamorphic, and sedimentary environments; water-worn and rounded into a pebble through mechanical weathering and transport in rivers, streams, or coastal beaches.
Uses & applications
Used in landscaping, decorative aggregates, abrasives, and sometimes tumbled or carved for lapidary purposes.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, making up a large percentage of beach sand.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and resistance to chemical weathering. Found worldwide in stream beds, beaches, and glacial deposits.
