sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale; typically white, gray, or transparent; vitreous to greasy luster; conchoidal fracture with no true cleavage; specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale; typically white, gray, or transparent; vitreous to greasy luster; conchoidal fracture with no true cleavage; specific gravity around 2.65.
Formation & geological history
Formed through the mechanical weathering and prolonged aqueous transport of larger quartz-bearing rocks, commonly found in riverbeds, beaches, and conglomerate sedimentary deposits.
Uses & applications
Used in landscaping, decorative gravel, aggregate in construction, and as a raw material in various industrial applications.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, surviving weathering processes that destroy other minerals.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and smooth, rounded shape resulting from water tumbling. Found worldwide.
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Quartz pebble
Silicon dioxide (SiO2)
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