sedimentary

Weathered quartz-rich pebble

Likely quartzite or quartz-rich sandstone; exact identification is uncertain from the photo

AI-generated identification · may be incorrect

Small, rounded, pale cream-gray pebble with rusty-brown spots and a dull, slightly granular surface. If quartzite, its main mineral is quartz (SiO₂), hardness about 7 Mohs; crystal structure is trigonal, with no cleavage and conchoidal fracture.

Identified October 12, 2026More sedimentary →

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Physical properties

Formation & geological history

Likely weathered from quartz-rich bedrock and rounded by water or sediment transport; its age and original source cannot be determined visually.

Uses & applications

Primarily a natural keepsake or landscaping pebble; quartz-rich rock may also be used as aggregate or building stone.

Geological facts

The brown marks are consistent with iron-oxide staining, though surface dirt or other minerals could produce similar spots.

Field identification & locations

Quartz-rich pebbles are common in river gravels, beaches, and glacial deposits. A grainy texture suggests sandstone; a hard, fused texture favors quartzite—simple field tests are needed to distinguish them.