sedimentary
River Pebble
Quartzite pebble
AI-generated identification · may be incorrectHardness 7 on Mohs scale, grayish-green color, vitreous luster, amorphous smooth rounded crystal structure.
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Physical properties
Hardness 7 on Mohs scale, grayish-green color, vitreous luster, amorphous smooth rounded crystal structure.
Formation & geological history
Formed by the weathering and aqueous abrasion of quartz-rich parent rock over thousands to millions of years.
Uses & applications
Used in landscaping, decorative ground cover, and garden pathways.
Geological facts
Continuous tumbling in fast-flowing water creates the characteristic smooth, polished surface of river pebbles.
Field identification & locations
Found abundantly in riverbeds and glacial deposits worldwide; identified by its smooth, rounded shape and high hardness.
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