sedimentary
Quartz pebble
Silicon dioxide (SiO2)
Hardness of 7 on the Mohs scale, color ranges from translucent white to brown or yellow due to iron staining, waxy to vitreous luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, color ranges from translucent white to brown or yellow due to iron staining, waxy to vitreous luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed via the weathering and erosion of parent igneous or metamorphic rocks, followed by prolonged water transport in rivers or beaches that smooths and rounds the stone.
Uses & applications
Used in landscaping, decorative gravel, tumbling, and as a raw material for glassmaking and silicon production.
Geological facts
Quartz is one of the most abundant and durable minerals on Earth's continental crust, capable of surviving multiple cycles of erosion and redeposition.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and smooth water-worn shape. Commonly found in riverbeds, beaches, and conglomerate rock formations.
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Quartz pebble
Silicon dioxide (SiO2)
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