Yaogangxian Mine, Yaogangxian W-Sn ore field, Yizhang Co., Chenzhou, Hunan, China

(Mn,Fe)WO₄

The term wolframite indicates intermediate members between hübnerite, MnWO₄, and ferberite, FeWO₄

Crystal System: monoclinic
Colour: greyish-black, yellow-brown, reddish-brown, blackish brown, black, red (rare)
Lustre: adamantine, resinous, metallic
Habitus: in massive or granular aggregates. Crystals are usually tabular
Hardness: 4 - 4½
Fracture: irregular/uneven
Cleavage: perfect on {010}
Density: 7.234 – 7.6 g/cm³
Origin and geological occurrence: it occurs in high-T hydrothermal veins and in greisens. Also in granite pegmatites and in alluvial and eluvial deposits

www.mindat.org
Smorf link

Samples:

	7.15  Wolframite Aggregate of prismatic crystals #wolframites
	7.19 Wolframite Cleaved black crystals with quartz and chalcopyrite. Cabrera Mt., Spain #economic minerals