Dims: 2.2" x 1.8" x 1.5"(5.6 x 4.6 x 3.8 cm)
Wt: 5.55 oz.(157.4 g)
Svornost Mine, Jachymov, northwestern Bohemia, Czech Republic
This specimen is officially labeled "Native Bismuth in skutterudite", implying a challenge as far as isolating the Bismuth is concerned. However, I don't believe that it is all that difficult. The skutterudite apppears as a very light-gray material with a bright metallic luster, whereas the bismuth appears tarnished and has a bit more of a reddish coloration. Though no definite crystals are visible, there are noticeable "faces" in the mass, implying uniformities that are related to the minerals' crystal structures. Needless to say, this material makes up most of the specimen's mass. It rests on a bed of what appears to be calcite that has a pinkish tinge, likely due to included cobalt. The calcite occurs in the form of small rhombohedral crystals. This is certainly an odd piece, and supposedly collected sometime in the 1920's.