sedimentary

Tumbled reddish-brown stone, likely iron-stained sandstone or quartzite

Probable ferruginous sandstone; exact identification requires testing

AI-generated identification · may be incorrect

Earthy to dull luster, reddish-brown coloration, rounded abrasion surfaces, and apparently fine-grained texture. Estimated hardness is about Mohs 5–7 depending on whether sandstone or quartzite; no visible crystals or cleavage.

Identified September 8, 2026More sedimentary →

Explore Tumbled reddish-brown stone, likely iron-stained sandstone or quartzite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Tumbled reddish-brown stone, likely iron-stained sandstone or quartzite
Scientific name: Probable ferruginous sandstone; exact identification requires testing
Category: sedimentary
Identified: September 8, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as a loose common specimen; usually under $20 unless unusually attractive, labeled, or part of a specialized collection.

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 a naturally weathered or tumbled siliciclastic rock cemented by silica or iron oxides; such rocks commonly formed from ancient sand deposits, potentially hundreds of millions to over a billion years old. The image alone cannot establish its age or exact lithology.

Uses & applications

Usually a common landscaping, craft, or curiosity specimen rather than a gem-quality material; quartz-rich varieties may be used as aggregate or building stone. Collector value is generally minimal.

Geological facts

The red-orange color commonly comes from hematite or other iron-oxide coatings between or around quartz grains. A glass-scratch test can help distinguish quartzite: it should readily scratch ordinary glass.

Field identification & locations

Common in sedimentary terrains, riverbeds, beaches, and gravel deposits worldwide. Inspect a fresh edge with magnification: visible sand grains suggest sandstone, while a fused sugary texture and uniformly hard surface suggest quartzite.