mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale; milky to translucent beige/white with slight iron staining; waxy to vitreous luster; trigonal crystal system; no cleavage (conchoidal fracture); specific gravity around 2.65.
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Physical properties
Hardness of 7 on Mohs scale; milky to translucent beige/white with slight iron staining; waxy to vitreous luster; trigonal crystal system; no cleavage (conchoidal fracture); specific gravity around 2.65.
Formation & geological history
Formed through hydrothermal or igneous processes, originally as vein quartz or pegmatitic quartz, and subsequently weathered and water-tumbled into a rounded pebble by river or wave action.
Uses & applications
Commonly used in landscaping, aquariums, polished decorative stones, and as an industrial source of silica in glassmaking and electronics.
Geological facts
Quartz is one of the most abundant and durable minerals on Earth's continental crust, which allows it to survive long-term mechanical weathering and become smooth beach and river pebbles.
Field identification & locations
Can be identified in the field by its ability to scratch glass (Mohs 7), lack of cleavage, and smooth, rounded surface resulting from fluvial or marine erosion.
