sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, typically white or translucent, vitreous luster, conchoidal fracture, and no cleavage.
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Physical properties
Mohs hardness of 7, typically white or translucent, vitreous luster, conchoidal fracture, and no cleavage.
Formation & geological history
Formed through the mechanical weathering and water transport of larger quartz rocks, smoothing edges over long periods in riverbeds or coastal environments.
Uses & applications
Used primarily in landscaping, decorative gravel, aggregate in construction, and by hobbyist collectors.
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Identified easily by its high hardness (scratches glass), smooth water-worn shape, and lack of cleavage. Found worldwide in riverbeds, beaches, and glacial outwash.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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