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The term "cliftonite" refers to carbon found in minute cubic crystals within meteoric iron. It is named after Robert B. Clifton, an English physicist.1

It is important to distinguish cliftonite from clintonite, which is a mica mineral composed of basic aluminosilicate of calcium, magnesium, and iron. Clintonite is harder and more brittle than common micas. Another related term is titanite, a titanium and calcium silicate mineral that is a minor component of many igneous rocks and can be used as a brilliant gem.23

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  1. cliftonite
  2. clintonite
  3. titanite

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