mineral

Iron-stained quartz-rich sulfide ore (probable gold-bearing quartz vein)

Quartz (SiO₂) with iron oxides/hydroxides, chiefly hematite–goethite; possible pyrite remnants

AI-generated identification · may be incorrect

Hardness ~6–7 for quartz, 5–6.5 for iron oxides; gray-white quartz with rusty yellow-brown coatings and dark metallic patches. Massive, non-cleavable quartz has vitreous luster; metallic areas may be sulfides or iron oxides.

Identified September 6, 2026More mineral →

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At a glance

Common name: Iron-stained quartz-rich sulfide ore (probable gold-bearing quartz vein)
Scientific name: Quartz (SiO₂) with iron oxides/hydroxides, chiefly hematite–goethite; possible pyrite remnants
Category: mineral
Identified: September 6, 2026
Method: Standard

AI Estimated Value

$5–$30 as an unattributed specimen; $30–$200+ if locality-documented or assay-confirmed gold-bearing ore.

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 vein material formed when silica-rich fluids filled fractures and deposited quartz with sulfide minerals, later weathering to iron oxides (“gossan”). Exact geological age and gold content cannot be determined visually.

Uses & applications

Used mainly as a mineral specimen or prospecting indicator; if assays confirm gold, it may represent ore. Not generally suitable for construction.

Geological facts

Rusty gossan commonly marks oxidation of pyrite, chalcopyrite, or arsenopyrite and can overlie deeper sulfide and gold mineralization. Dark patches are not proof of gold; testing or assay is required.

Field identification & locations

Look for quartz veining, boxwork cavities, metallic sulfides, unusual density, and streak; gold is soft, yellow, and leaves a yellow streak, unlike pyrite. Common in hydrothermal districts worldwide, including Nevada, California, Australia, and Canada.