mineral
Hematite bead bracelet
Hematite (iron(III) oxide, Fe₂O₃), likely polished specular hematite
AI-generated identification · may be incorrectPolished, metallic gray-to-black spherical beads with a mirrorlike luster; hardness 5–6.5 Mohs, trigonal crystal system, no prominent cleavage, and specific gravity about 5.0–5.3. The highly reflective surface may also indicate hematine, a manufactured hematite-like material, or another iron-oxide bead.
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Physical properties
Polished, metallic gray-to-black spherical beads with a mirrorlike luster; hardness 5–6.5 Mohs, trigonal crystal system, no prominent cleavage, and specific gravity about 5.0–5.3. The highly reflective surface may also indicate hematine, a manufactured hematite-like material, or another iron-oxide bead.
Formation & geological history
Natural hematite forms through oxidation of iron-rich fluids, sedimentary processes, or hydrothermal activity, with deposits ranging from Precambrian banded iron formations to younger ores. These beads are shaped and polished from mined material; the image alone cannot confirm authenticity.
Uses & applications
Used as an iron ore, pigment, ornamental stone, and jewelry material. Hematite is inexpensive and commonly sold as polished beads or cabochons.
Geological facts
A diagnostic streak test gives hematite a reddish-brown to cherry-red streak, even when the specimen appears black and metallic. It is weakly magnetic or nonmagnetic, whereas strongly magnetic beads may be magnetite or synthetic material.
Field identification & locations
Common localities include Brazil, Australia, South Africa, Canada, and the United States. Test an inconspicuous spot with an unglazed tile for red-brown streak; avoid scratching finished jewelry.
