sedimentary

Weathered quartz-rich sandstone, possibly iron-stained quartzite

Quartz sandstone (quartz arenite), SiO₂-rich; exact identification requires hardness and texture tests

AI-generated identification · may be incorrect

Tan, orange, and reddish-brown, with layered grainy bands and earthy/dull luster; likely Mohs hardness 6–7, little or no cleavage, and moderate density (~2.2–2.7 g/cm³). The rounded shape and surface suggest prolonged weathering or stream abrasion.

Identified August 21, 2026More sedimentary →

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At a glance

Common name: Weathered quartz-rich sandstone, possibly iron-stained quartzite
Scientific name: Quartz sandstone (quartz arenite), SiO₂-rich; exact identification requires hardness and texture tests
Category: sedimentary
Identified: August 21, 2026
Method: Standard

AI Estimated Value

Approximately $1–$15 as a common hand specimen; $20–$75 if unusually colorful, well-shaped, or from a documented 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 deposited as sand in an ancient river, shoreline, or desert, then compacted and cemented; iron oxides produced the orange-red staining. Its geological age cannot be determined from the photograph and may range from young to Precambrian.

Uses & applications

Common sandstone is used for building stone, paving, aggregate, and landscaping; attractive pieces are collected or used as décor. If strongly metamorphosed into quartzite, it is also valued for durable architectural stone.

Geological facts

Visible bedding or cross-bedding would support sandstone, while a uniformly fused, sugary texture would favor quartzite. The specimen does not appear to be a crystal, gemstone, fossil, or meteorite.

Field identification & locations

Common in sedimentary terrains worldwide, including the Colorado Plateau, Appalachians, Australian ranges, and many desert regions. Check for individual sand grains, acid reaction (usually absent), and whether steel scratches it; a streak test is generally inconclusive.