Wolframite

[wulfrәmait]

Definition

(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.

Checker: Max--From WordNet

Definition

(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.

Inputed by Carmela