mineral

Uncertain dark metallic mineral specimen, possibly specular hematite or magnetite

Likely hematite (Fe₂O₃) or magnetite (Fe₃O₄); image alone is insufficient for firm identification

AI-generated identification · may be incorrect

Dark gray to black with strong metallic-to-submetallic luster and reflective crystal faces; likely Mohs hardness 5.5–6.5, with magnetite strongly magnetic and hematite commonly leaving a red-brown streak. The visible mass appears crystalline and partly weathered.

Identified August 19, 2026More mineral →

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At a glance

Common name: Uncertain dark metallic mineral specimen, possibly specular hematite or magnetite
Scientific name: Likely hematite (Fe₂O₃) or magnetite (Fe₃O₄); image alone is insufficient for firm identification
Category: mineral
Identified: August 19, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a common hand specimen; $30–$150+ if strongly magnetic, unusually lustrous, or well crystallized.

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

Iron oxides commonly form in hydrothermal veins, metamorphic rocks, banded iron formations, and weathering zones; ages range from recent deposits to Precambrian formations. The specimen may be naturally fractured or hand-trimmed.

Uses & applications

Used as iron ore, pigment, polishing material, and a collector specimen; attractive lustrous pieces may be sold as cabinet minerals, though this example appears modest quality.

Geological facts

Magnetite is naturally magnetic, while hematite is usually weakly magnetic or nonmagnetic; streak color is a reliable distinction. Metallic luster can also occur in ilmenite or sulfides.

Field identification & locations

Test with a magnet and streak on unglazed porcelain: black streak and strong magnetism suggest magnetite; red-brown streak suggests hematite. Common sources include the Lake Superior region, Brazil, Australia, India, and South Africa.