Formula: Mn2+(WO4) anhydrous tungstate, but according to Mindat this species is misclassified in
Dana 8th edition. There are no WO4 tetrahedra in it, so it should be classified as a simple oxide.
Hübnerite forms a complete solid solution series with ferberite.
Specific gravity: 7.12 to 7.18
Hardness: 4 to 4½
Streak: Greenish-grey, yellow to reddish-brown
Colour: Yellow-brown, reddish-brown, blackish brown, black, red (rare)
Hübnerite occurs in high-temperature (hypothermal) hydrothermal veins and medium temperature metamorphic rocks. It also
occurs in granite pegmatites and in alluvial and residual deposits.
Associated minerals include cassiterite, arsenopyrite, molybdenite, tourmaline, topaz, rhodochrosite and fluorite.
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