sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, colors vary from white, clear, to yellowish brown, vitreous luster, conchoidal fracture, specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, colors vary from white, clear, to yellowish brown, vitreous luster, conchoidal fracture, specific gravity around 2.65.
Formation & geological history
Formed through weathering and water transport of primary igneous or metamorphic quartz veins, smoothed over long periods in riverbeds or marine environments.
Uses & applications
Used in landscaping, decorative gravel, aquarium substrates, and as a raw material for glassmaking and silicon production.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Found worldwide in riverbeds, beaches, and alluvial gravel deposits. Easily identified by its high hardness, lack of cleavage, and resistance to scratching by steel.
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Quartz pebble
Silicon dioxide (SiO2)
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