mineral

Small dark, polished stone—possibly hematite or magnetite

Indeterminate from the photograph; candidates include hematite (Fe₂O₃) and magnetite (Fe₃O₄)

AI-generated identification · may be incorrect

Black to dark gray with a glossy, uneven surface; grain size and crystal structure are not visible. Hardness, streak, cleavage, and specific gravity cannot be determined reliably from the image.

Identified October 9, 2026More mineral →

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At a glance

Common name: Small dark, polished stone—possibly hematite or magnetite
Scientific name: Indeterminate from the photograph; candidates include hematite (Fe₂O₃) and magnetite (Fe₃O₄)
Category: mineral
Identified: October 9, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a common small specimen; higher value would require confirmed identity and notable quality.

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

Black to dark gray with a glossy, uneven surface; grain size and crystal structure are not visible. Hardness, streak, cleavage, and specific gravity cannot be determined reliably from the image.

Formation & geological history

If hematite or magnetite, it likely formed in iron-rich geological deposits through oxidation, hydrothermal activity, or other mineral-forming processes; age and exact origin are unknown.

Uses & applications

Small specimens may be collected or used in jewelry; hematite and magnetite also have major industrial importance as iron ores.

Geological facts

Both minerals can look black and shiny when polished, so appearance alone is insufficient to distinguish them.

Field identification & locations

Check streak on unglazed porcelain (hematite: reddish brown; magnetite: black) and test magnetism (magnetite is strongly magnetic). The photo does not establish an exact identification or locality.