metamorphic

Iron-stained quartz-rich rock, possibly quartz vein material

Quartz-rich vein rock with iron oxides/hydroxides (quartz, Fe₂O₃/FeO(OH)); exact identification requires testing

AI-generated identification · may be incorrect

Coarse, irregular quartz-rich mass with rusty red-brown, ochre, and pale gray areas. Quartz has Mohs hardness 7, vitreous luster, and hexagonal crystal structure; iron staining is earthy to dull. The specimen’s cleavage and density cannot be established from the image.

Identified October 14, 2026More metamorphic →

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At a glance

Common name: Iron-stained quartz-rich rock, possibly quartz vein material
Scientific name: Quartz-rich vein rock with iron oxides/hydroxides (quartz, Fe₂O₃/FeO(OH)); exact identification requires testing
Category: metamorphic
Identified: October 14, 2026
Method: Standard

AI Estimated Value

About $0–$20 for a common, unprepared hand specimen; higher value would require notable locality, crystals, or verified ore minerals.

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 filled fractures and crystallized as quartz, followed or accompanied by iron-oxide alteration. The age and host-rock setting are not determinable from the photograph.

Uses & applications

Comparable material may be used as decorative stone, aggregate, or mineral-collection material; no obvious gem-quality crystals are visible.

Geological facts

Rust-colored staining commonly comes from hematite or goethite produced by oxidation of iron-bearing minerals.

Field identification & locations

Look for hard, glassy quartz patches that resist scratching by a steel nail, alongside softer rusty coatings. Quartz veins occur worldwide; the pictured outcrop context is insufficient to identify a locality or rock type confidently.