magnetite

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Scope note
Black opaque mineral composed of ferro-ferric oxide that is strongly magnetic; a common mineral in large deposits in Sweden, Norway, the Urals, Italy, Switzerland, Australia, Brazil, United States, and Canada. Magnetite is brittle and fractures unevenly. When it possess a polarity, magnetite is called lodestone. Magnetite was used in antiquity for jewelry, amulet beads, seals and as a substitute for black pearls. It is also used as a black pigment in paints, linoleum, ceramic glazes, and glass.
magnetite
Accepted term: 18-Nov-2024