sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, clear, or light yellowish-brown due to iron staining. Vitreous luster, trigonal crystal system, no true cleavage, and specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, clear, or light yellowish-brown due to iron staining. Vitreous luster, trigonal crystal system, no true cleavage, and specific gravity around 2.65.
Formation & geological history
Formed through the weathering and prolonged water transport of quartz-bearing rocks like granite or vein quartz, typically in riverbeds or marine environments.
Uses & applications
Used in landscaping, decorative stone, and as a raw material in various industrial applications.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is highly resistant to both chemical and physical weathering, allowing pebbles to survive long journeys in river systems.
Field identification & locations
Easily identified by its high hardness (scratches glass) and smooth, rounded water-worn shape. Found worldwide in stream beds, beaches, and gravel deposits.
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Quartz pebble
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