ARSENOPYRITE, FeAsS - Iron Arsenical Pyrite. Good grouping of minerals, zinnwaldite, arsenopyrite, fluorite and Wolframite (Ferberite).WOLFRAMITE, (Fe,Mn)WO4 - Iron Manganesium Tungstate..This is the intermediate member of the isomorphoous series of the minerals HUBNERITE-FERBERITE. Most dealers use Ferberite as the term as it is difficult without testing to be sure of Wolframite. These were sold to me as being Wolframite. Arsenopyrite is grouping of crystals with blocky, metallic silver and lustrous mirror finish face, good textbook form and is double terminated. Three good Wolframite crystals peer out on back of specimen with some fluorite. No damage. From Yao Gan Xian, Wolfram Mine, Yizhang, Hunan Province, China. Size is(3.2cm) 1-1/4"w x (3.5cm)1-3/8"d x (2cm) 3/4"h. Item MM0068. Weight 0.13 lbs.
