wolframite

n. mineral

Wolframite (Fe,Mn)WO4, is an iron manganese tungstate mineral that is the intermediate between ferberite (Fe2+ rich) and huebernite (Mn2+ rich). Along with scheelite, the wolframite series are the most important tungsten ore minerals. Wolframite is found in quartz veins and pegmatites associated with granitic intrusives. Associated minerals include cassiterite, scheelite, bismuth, quartz, pyrite, galena, sphalerite, and arsenopyrite.
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Noun
1. a mineral consisting of iron-manganese tungstate in crystalline form; the principal ore of tungsten; found in quartz veins associated with granitic rocks
(synonym) iron manganese tungsten
(hypernym) mineral
(substance-meronym) tungsten, wolfram, W, atomic number 74

n. wolframite, mineral

(n.)
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.