sedimentary

Rounded quartz-rich pebble

Likely quartzite or quartz-rich sandstone; composition is not certain from the photograph

AI-generated identification · may be incorrect

Pale yellow-beige, fine-grained, matte to slightly waxy surface, and water-worn rounded shape. If quartzite, it is mainly interlocking quartz (SiO₂), hardness about 7 Mohs; sandstone may be softer and grainy.

Identified October 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Likely weathered and rounded during transport by water, then deposited in a stream or beach gravel. Its geological age and exact formation cannot be determined from appearance alone.

Uses & applications

Primarily a common natural pebble or collecting specimen; quartz-rich material can also be used as aggregate or landscaping stone.

Geological facts

Quartzite forms when sandstone is metamorphosed; quartz-rich sandstone remains sedimentary. A fresh broken surface or close inspection of individual grains helps distinguish them.

Field identification & locations

Rounded edges and pale color suggest a transported pebble, but these features do not establish its source. Similar stones occur in river, beach, and glacial deposits worldwide.