sedimentary

Weathered sandstone or conglomeratic sandstone

Clastic sedimentary rock, chiefly quartz and feldspar grains cemented by iron oxides and silica/calcite

AI-generated identification · may be incorrect

Coarse, irregular granular texture with tan-brown to rusty coloration, likely from iron-oxide staining; dull to earthy luster, no obvious cleavage, and probable Mohs hardness around 6–7 for individual quartz grains. The rounded surface and apparent granular structure suggest weathering and abrasion.

Identified September 6, 2026More sedimentary →

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At a glance

Common name: Weathered sandstone or conglomeratic sandstone
Scientific name: Clastic sedimentary rock, chiefly quartz and feldspar grains cemented by iron oxides and silica/calcite
Category: sedimentary
Identified: September 6, 2026
Method: Standard

AI Estimated Value

Common hand specimen: approximately $1–$10 USD; higher value is unlikely unless it has unusual fossils, provenance, or attractive mineralization.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Formed when sand-sized sediment accumulated, compacted, and cemented, probably in a river, alluvial, or coastal environment; its exact geological age cannot be determined from the photograph. Rusty colors indicate oxidation of iron-bearing minerals during weathering.

Uses & applications

Common sandstone is used for building stone, paving, aggregate, and landscaping; this small specimen is mainly suitable for educational or casual collecting.

Geological facts

The image does not show diagnostic fossils, bedding, or a clear conglomerate texture, so precise identification is limited without a fresh break, hand lens, hardness test, and acid test.

Field identification & locations

Look for visible quartz grains, gritty texture, and possible layering; sandstone commonly occurs in sedimentary basins worldwide. A streak test, dilute hydrochloric-acid test, and examination of a freshly broken surface would improve identification.