sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to translucent with brownish iron-staining, vitreous to waxy luster, conchoidal fracture with no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to translucent with brownish iron-staining, vitreous to waxy luster, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed through the weathering and prolonged aqueous transport of larger quartz-bearing rocks (such as granite or pegmatite), smoothing edges in rivers or marine environments over thousands to millions of years.
Uses & applications
Used in landscaping, decorative stone, abrasive manufacturing, and as tumbled stones for lapidary and crafting.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, making up a large portion of beach sand and river pebbles.
Field identification & locations
Easily identified in the field by its high hardness (scratches glass), lack of cleavage, and smooth water-worn shape. Commonly found in riverbeds, beaches, and conglomeratic sedimentary rock formations worldwide.
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