metamorphic

Iron-stained quartz vein rock

Quartz-rich vein material, predominantly SiO₂, with iron oxyhydroxides (goethite/limonite) and likely sulfide alteration

AI-generated identification · may be incorrect

Hardness about 6.5–7 for quartz; gray to white and rusty orange-brown, with vitreous to earthy luster and irregular fracture. The specimen appears massive and granular rather than showing distinct crystal faces or cleavage.

Identified September 6, 2026More metamorphic →

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At a glance

Common name: Iron-stained quartz vein rock
Scientific name: Quartz-rich vein material, predominantly SiO₂, with iron oxyhydroxides (goethite/limonite) and likely sulfide alteration
Category: metamorphic
Identified: September 6, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common hand specimen; roughly $30–$100 if unusually attractive, mineralized, or locality-documented.

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 hydrothermal quartz vein or silicified metamorphic rock, later weathered and oxidized near the surface; its exact geological age cannot be determined from the photograph. Rust-colored zones represent iron-bearing minerals altered by groundwater and oxygen.

Uses & applications

Used mainly as a teaching, lapidary, or collector specimen; attractive pieces may be cut or polished, but it has little industrial value unless associated with economically significant ore minerals.

Geological facts

The dark metallic-looking patches could be iron oxides or weathered sulfides, but mineral identification requires hardness, streak, magnetism, and possibly chemical or instrumental testing.

Field identification & locations

Look for quartz hardness, abundant rusty staining, and absence of obvious sedimentary layering. Common in hydrothermal vein districts and mineralized metamorphic terrains worldwide.