sedimentary

Likely sandstone pebble

Quartz-rich sandstone (composition uncertain from the image)

AI-generated identification · may be incorrect

Brown, dull and granular, with a rounded pebble shape; sandstone commonly has Mohs hardness around 6–7, but cementation varies. Individual grains and crystal structure are not clearly visible, so cleavage and specific gravity cannot be determined.

Identified October 8, 2026More sedimentary →

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Physical properties

Formation & geological history

Sand grains compacted and cemented into rock, then weathered and rounded during transport; its geological age and source are unknown.

Uses & applications

Common sandstone is used as building stone, paving, and landscaping material; this small specimen is mainly suitable for collecting or decoration.

Geological facts

Sandstone is made of sand-sized mineral or rock fragments, commonly quartz, bound by silica, calcite, or iron-rich cement.

Field identification & locations

The visible tan-brown color and granular surface are consistent with sandstone, though a photograph cannot confirm the identification. Examine a fresh surface for cemented grains; common sandstone pebbles have little individual market value.