sedimentary

Weathered fine-grained stone, likely sandstone or quartzite

Quartz-rich sandstone (possibly weakly metamorphosed quartzite); predominantly SiO₂

AI-generated identification · may be incorrect

Pale gray, fine-grained, dull to slightly gritty surface with scattered rusty-orange iron-oxide staining; likely hardness about 6–7, no obvious cleavage, and moderate density. Exact identification requires a fresh surface and tests for grain texture and acid reaction.

Identified August 7, 2026More sedimentary →

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At a glance

Common name: Weathered fine-grained stone, likely sandstone or quartzite
Scientific name: Quartz-rich sandstone (possibly weakly metamorphosed quartzite); predominantly SiO₂
Category: sedimentary
Identified: August 7, 2026
Method: Standard

AI Estimated Value

$1–$10 for a common loose specimen; higher only if laboratory-proven, unusually patterned, or from a notable locality.

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

Likely formed from compacted and cemented quartz-rich sand, then weathered at the surface; if quartzite, it underwent later heat and pressure. Its geological age cannot be determined from the photograph.

Uses & applications

Ordinary material may be used as aggregate, fill, paving, or landscaping stone; attractive pieces can be collected, but this specimen has no apparent gem or commercial value.

Geological facts

The orange patches are probably limonite or hematite produced by oxidation of trace iron minerals. A scratch test and examination with a hand lens would distinguish sandstone from quartzite.

Field identification & locations

Common in sedimentary and metamorphic terrains worldwide. Look for visible sand grains and weak abrasion in sandstone; quartzite is harder, more fused, and typically scratches glass.