| staurolite | <chemical> A mineral of a brown to black colour occurring in prismatic crystals, often twinned so as to form groups resembling a cross. It is a silicate of aluminia and iron, and is generally found imbedded in mica schist. Synonym: granatite, and grenatite. Origin: Gr. A cross. Source: Websters Dictionary (01 Mar 1998) |
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