WOLFRAMITE
wolframite, iron manganese tungsten
(noun) a mineral consisting of iron and manganese tungstate in crystalline form; the principal ore of tungsten; found in quartz veins associated with granitic rocks
Source: WordNet® 3.1
Etymology
Noun
wolframite (countable and uncountable, plural wolframites)
(mineral) A mineral that consists of a tungstate of iron and manganese; (Fe,Mn)WO4.
Source: Wiktionary
Wol"fram*ite, n. Etym: [G., wolframit, wolfram; wolf wolf + rahm
cream, soot; cf. G. wolfsruss wolfram, lit., wolf's soot.] (Min.)
Definition: Tungstate of iron and manganese, generally of a brownish or
grayish black color, submetallic luster, and high specific gravity.
It occurs in cleavable masses, and also crystallized. Called also
wolfram.
Source: Webster’s Unabridged Dictionary 1913 Edition