sedimentary

Weathered sandstone (probable quartz arenite)

Clastic sandstone, chiefly quartz (SiO₂) grains with possible feldspar and iron-oxide/calcite cement

AI-generated identification · may be incorrect

Typically Mohs 6–7 for quartz grains, but friable overall; tan to cream, dull earthy luster, granular texture, and no obvious cleavage. The specimen shows weathered surfaces and faint layering or cement variation.

Identified September 21, 2026More sedimentary →

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At a glance

Common name: Weathered sandstone (probable quartz arenite)
Scientific name: Clastic sandstone, chiefly quartz (SiO₂) grains with possible feldspar and iron-oxide/calcite cement
Category: sedimentary
Identified: September 21, 2026
Method: Standard

AI Estimated Value

About $1–$10 as a common loose specimen; $10–$50 if it has unusual color, fossils, structures, or provenance.

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 accumulated, was compacted, and cemented in a river, beach, dune, or shallow-marine environment; its precise geological age cannot be determined from the image. Weathering has rounded edges and exposed contrasting cement or bedding.

Uses & applications

Used as building stone, paving, aggregate, and ornamental stone; attractive varieties are cut for slabs and landscaping. Ordinary hand specimens generally have little commercial value.

Geological facts

Sandstone commonly preserves cross-bedding, ripple marks, mud cracks, and fossils, making it important for reconstructing ancient environments. Iron oxides produce the common tan, yellow, red, and brown colors.

Field identification & locations

Look for visible sand grains, gritty texture, bedding, and acid-insensitive quartz-rich composition; a hand lens and streak/acid tests help distinguish it from limestone. Common worldwide, especially in sedimentary basins and desert, coastal, and river deposits.