mineral

Iron-oxide-stained quartz-rich rock, possibly ironstone or quartz vein material

Quartz (SiO₂) with iron oxides, likely hematite (Fe₂O₃) and/or goethite (FeO(OH)); exact host rock is uncertain from the image

AI-generated identification · may be incorrect

Pale cream, rough and opaque, with dark reddish-brown patches and a dull to locally glassy luster. Quartz has Mohs hardness 7 and trigonal crystal structure; iron oxides may leave a reddish-brown streak. The visible specimen is too small and weathered for reliable cleavage or density assessment.

Identified October 8, 2026More mineral →

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At a glance

Common name: Iron-oxide-stained quartz-rich rock, possibly ironstone or quartz vein material
Scientific name: Quartz (SiO₂) with iron oxides, likely hematite (Fe₂O₃) and/or goethite (FeO(OH)); exact host rock is uncertain from the image
Category: mineral
Identified: October 8, 2026
Method: Standard

AI Estimated Value

About $1–$10 USD for a small, common, unverified hand specimen.

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 fluids deposited quartz in a fracture, followed or accompanied by iron-oxide staining during weathering. No age or precise geological setting can be determined from appearance alone.

Uses & applications

Commonly collected as a mineral specimen; quartz-rich material may have industrial uses when sufficiently pure, but this piece is not suitable for jewelry or construction.

Geological facts

Iron oxides produce the distinctive brown-red patches, while quartz resists scratching by a steel knife. The image does not show diagnostic crystal faces or other features that establish a specific rock name.

Field identification & locations

Look for hardness, a glassy fresh fracture, and a reddish-brown streak from the dark patches; these tests can help distinguish quartz and iron oxides. Quartz veins with iron staining occur worldwide.