Siderite on Pyrite pseudomorphs with Stannite (ex Tom Campbell Collection)

Item Description

The Siete Suyos mine (Seven Servants mine) is sometimes considered to be part of the Animas mine, and it is often difficult to know where specimens are from because several mines in the area share the same vein system. The good news is that I directly obtained this specimen from the miner who collected it, so I know for certain where it came from. I honestly have never seen any specimens from this locality before, but I was happy to purchase the pieces I obtained. This piece features a few good quality, sharp, very dark greenish-brown, highly modified rhombic/scalenohedral crystals of Siderite measuring up to 1.8 cm which are sitting upon unusual compressed looking crystals of lustrous Pyrite (most likely a pseudomorph after Siderite) which are associated with minor grey crystals of the rare sulfide, Stannite. I rarely have seen such gemmy crystals, especially with such unique form. So far, this find was very limited, so if you're a collector of Bolivian minerals, be sure to pick this one up. From the worldwide collection of Tom Campbell. Tom is a mineralogist and mineral collect who works with us here at The Arkenstone. He has over 35 years of experience in the fields of exploration geology, mining, and applied mineralogy, and has even more years under his belt as a collector! Tom has described many new species over the years, and discovered the rare phosphates Tiptopite, Fransoletite and Pahasapaite. Tom was also a co-author on the second edition of the Encylopedia of Minerals. You can see a list of Tom's published works here ( https://www.irocks.com/thomas-j-campbell-publications-list ).