mineral
Quartz Pebble with Jasper and Iron Inclusions
Silicon Dioxide (SiO2)
Hardness 7 on Mohs scale; waxy to vitreous luster; microcrystalline to crystalline structure; smooth water-worn surface; mixture of white, reddish-brown, and greyish hues.
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Physical properties
Hardness 7 on Mohs scale; waxy to vitreous luster; microcrystalline to crystalline structure; smooth water-worn surface; mixture of white, reddish-brown, and greyish hues.
Formation & geological history
Formed through hydrothermal deposition in host rock fractures, then eroded and smoothed by river or coastal wave action over thousands to millions of years.
Uses & applications
Popular for beachcombing, pebble collections, lapidary tumbling, and decorative garden/aquarium stonework.
Geological facts
Smooth river and beach pebbles gain their rounded shape from continuous abrasion against other stones and sand caused by moving water.
Field identification & locations
Identified by its hard quartz surface that scratches steel, milky white veins mixed with colorful jasper/iron oxide veins, and river-polished smooth texture. Commonly found along rocky coastlines and stream beds.
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Mineral
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Mineral/Rock