sedimentary

Iron-stained quartz-rich rock, possibly ironstone or silicified breccia

Likely quartz-rich, iron-oxide-cemented rock; exact identification is uncertain from the photo

AI-generated identification · may be incorrect

Angular fragments and pale granular material are cemented by reddish-brown iron oxides. Quartz is typically Mohs 7 with vitreous luster; iron oxides are softer and earthy to dull. No distinct crystal structure or cleavage is visible.

Identified October 15, 2026More sedimentary →

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At a glance

Common name: Iron-stained quartz-rich rock, possibly ironstone or silicified breccia
Scientific name: Likely quartz-rich, iron-oxide-cemented rock; exact identification is uncertain from the photo
Category: sedimentary
Identified: October 15, 2026
Method: Standard

AI Estimated Value

About $1-$15 for a small, common unverified specimen; higher value would require unusual structure, verified locality, or attractive display quality.

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 when silica-rich grains or fragments were cemented and stained by iron oxides during sedimentary deposition or later weathering. A precise age cannot be determined from appearance alone.

Uses & applications

Mostly a collecting or decorative specimen; iron-rich material can be an iron ore if sufficiently concentrated, while quartz-rich stone may be used as aggregate.

Geological facts

The red and brown colors commonly come from hematite or goethite. The image does not show enough diagnostic detail to distinguish ironstone from an iron-stained breccia or another quartz-rich rock.

Field identification & locations

The reported location in northwestern Iran is broadly compatible with varied sedimentary and volcanic rocks, but does not establish provenance. Check for scratch-resistant quartz grains and a reddish-brown streak; field identification would need a fresh surface and tests.