mineral

Hematite cameo or hematine imitation

Hematite (Fe₂O₃); possibly synthetic hematine or black glass

AI-generated identification · may be incorrect

Dark gray-black, metallic to submetallic luster, opaque, commonly carved and polished; hematite has Mohs hardness 5–6 and a reddish-brown streak. The portrait carving and uniformly glossy appearance suggest a manufactured cameo, and the image alone cannot distinguish natural hematite from hematine or glass.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Natural hematite forms through oxidation in hydrothermal, sedimentary, and igneous environments, from Precambrian to recent ages; a carved specimen is human-processed rather than a newly formed rock. Hematine is a synthetic hematite-like material.

Uses & applications

Used for carved cameos, jewelry, ornamental objects, and pigment; hematite is also an important iron ore. Common carved pieces generally have modest decorative value.

Geological facts

A streak test on unglazed porcelain is diagnostic: hematite produces a red to reddish-brown streak, unlike black glass or many imitations. A strong magnet is not conclusive, though some hematine compositions respond weakly.

Field identification & locations

Common natural hematite occurs worldwide, notably Brazil, Australia, the United States, England, and South Africa. Inspect edges and inclusions, test streak only with permission, and avoid destructive testing on antiques.