tetrahedrite(redirected from Annivite)
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(Cu,Fe,Zn,Ag)12Sb4S13 A grayish-black mineral crystallizing in the isometric system as tetrahedrons and occurring in massive or granular form; luster is metallic, hardness is 3.5-4 on Mohs scale, and specific gravity is 4.6-5.1; an important ore of copper. Also known as fahlore; gray copper ore; panabase; stylotypite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.