staurolite

noun stau·ro·lite \ˈstȯr-ə-ˌlīt\

Definition of STAUROLITE

: a mineral consisting of a basic silicate of iron and aluminum in prismatic orthorhombic crystals often twinned so as to resemble a cross

— stau·ro·lit·ic \ˌstȯr-ə-ˈli-tik\ adjective

French, from Greek stauros cross + French -lite — more at steer

First Known Use: circa 1815

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