sedimentary

Rounded sandstone pebble

Quartz-rich sandstone, likely arkose or lithic sandstone

AI-generated identification · may be incorrect

Tan, fine- to medium-grained, matte and weakly granular; likely hardness about 6–7 due to quartz, with no obvious cleavage. Rounded shape indicates water or glacial abrasion; exact composition cannot be confirmed from the photograph.

Identified September 20, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from compacted and cemented sand, probably during a sedimentary basin’s burial history; its geological age is indeterminate from appearance alone. The rounded surface likely developed in a stream, beach, or glacial environment.

Uses & applications

Common sandstone is used for building stone, paving, aggregate, and landscaping; this small pebble has mainly educational or decorative value.

Geological facts

The specimen appears natural rather than concrete or ceramic, but a photograph cannot reliably distinguish sandstone from a weathered quartz-rich rock such as quartzite.

Field identification & locations

Look for visible sand grains, faint layering, and a sugary fracture; sandstone is commonly found in streambeds, beaches, deserts, and sedimentary outcrops. A streak, acid, hardness, and fresh broken surface would improve identification.