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M219 Hubnerite

M219 Hubnerite


Here’s something we haven’t seen before, an amazing specimen of Hubnerite from Silverton Adams mine in Colorado. The pristine brownish crystals stand out even more in the lighter colored Andesite matrix. It measures 3 1/2″ x 2 5/8″ x 2 1/2″ and is in it’s natural state. Grab this unique mineral quick!

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Hubnerite is a mineral consisting of manganese tungsten oxide. It is the manganese endmember of the manganese–iron wolframite solid solution series. It forms reddish brown to black monoclinic prismatic submetallic crystals. The crystals are typically flattened and occur with fine striations. It has a high specific gravity of 7.15 and a Mohs hardness of 4.5. It is transparent to translucent with perfect cleavage. It was first described in 1865 for an occurrence in the Erie and Enterprise veins, Mammoth district, Nye County, Nevada, and named after the German mining engineer and metallurgist, Adolf Hübner from Freiberg, Saxony.

Additional information

Weight1.00 lbs
Dimensions3.5 × 2.625 × 2.5 in

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