IMCN9 Genthelvite on Dodecahedral (!) Magnetite
Huanggang Mine, Hexigten Banner (Keshiketeng Co.), Ulanhad League (Chifeng Prefecture), Inner Mongolia Autonomous Region, China 5.2x 4.1x 3.1 cm
5.2x 4.1x 3.1 cm
A very unusual genthelvite, the only one I was able to get that had a magnetite association. Before I even mention the genthelvite, it is worth noting that the magnetite matrix is composed of dodecahedralcrystals. This is highly unusual in magnetite, except (I am told) in skarn deposits. Everywhere else, they are usually octahedral.
Interesting as that is however, the focus of the specimen is the very rare genthelvite. There are several brown crystals scattered on top of the magnetite, and while the larger, nearly solid clusters of genthelvite I have posted are undoubtedly richer and more impressive examples of the species, the combination of magnetite and genthelvite makes this one quite unique, and to my mind, a much more delicate and beautiful example.