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Definition of staurolite


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Houghton Mifflin

stau·ro·lite  audio  (stôr-lt) KEY 

NOUN:
A brownish to black mineral, chiefly (FeMg)2Al9Si4O23(OH), often having crossed intergrown crystals and sometimes used as a gem.

ETYMOLOGY:
Greek stauros, cross; see st- in Indo-European roots + -lite

OTHER FORMS:
stauro·litic  (-ltk) KEY (Adjective)


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