mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, clear, or light yellowish-brown in color, vitreous luster, trigonal crystal system, 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, clear, or light yellowish-brown in color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed through crystallization from silica-rich solutions or cooling magmas. Over long periods of time, weathering and water transport smooth the edges into rounded pebbles found in riverbeds and beaches.
Uses & applications
Used in landscaping, decorative items, manufacturing of glass, electronics, and abrasives.
Geological facts
Quartz is one of the most abundant and durable minerals in the Earth's continental crust, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Easily identified by its high hardness (scratches glass) and conchoidal fracture. Commonly found worldwide in streams, rivers, and coastal beaches.
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