mineral

Raw dark metallic mineral specimen, possibly native gold-bearing quartz or sulfide ore

Uncertain from image; possible pyrite/chalcopyrite-bearing quartz or gold-bearing sulfide matrix

AI-generated identification · may be incorrect

Black to dark gray, irregular, strongly metallic-looking surface with small brassy-gold patches; apparent hardness roughly 5–7, but color, streak, magnetism, and density are needed for identification. No clear crystal faces or cleavage are visible.

Identified September 13, 2026More mineral →

Explore Raw dark metallic mineral specimen, possibly native gold-bearing quartz or sulfide ore 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: Raw dark metallic mineral specimen, possibly native gold-bearing quartz or sulfide ore
Scientific name: Uncertain from image; possible pyrite/chalcopyrite-bearing quartz or gold-bearing sulfide matrix
Category: mineral
Identified: September 13, 2026
Method: Standard

AI Estimated Value

About $1–$20 as an unidentified common specimen; $25–$200+ if attractive mineralization is confirmed, and substantially more only if assay proves significant native gold.

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 hydrothermal vein mineral formed when hot, mineral-rich fluids deposited sulfides and quartz in fractures; age depends on its host deposit and cannot be determined photographically.

Uses & applications

Potentially valuable as an ore specimen if gold or copper is confirmed; otherwise mainly a teaching or collector specimen, with little construction use.

Geological facts

Brassy patches may be pyrite (“fool’s gold”), chalcopyrite, or actual native gold; image color alone cannot distinguish them. Gold is malleable and non-tarnishing, whereas pyrite is brittle and commonly forms crystalline faces.

Field identification & locations

Common possibilities occur in hydrothermal veins and mining districts worldwide. Test streak on unglazed porcelain, magnetism, specific gravity, and malleability; professional assay is required to verify gold.