Siderite, Pyrite, Stannite
Siete Suyos mine, Atocha-Quechisla District, Sud Chichas Province, Potosi Department, Bolivia
Toenail, 2.9 x 2.6 x 1.7 cm
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. This piece features several excellent, sharp, gemmy, greenish-brown crystals of Siderite measuring up to 1.0 cm which are sitting upon an unusual crystal of lustrous Pyrite (possibly a pseudomorph after Siderite) which are associated with minor grey crystals of the rare sulfide, Stannite. For Siderite, the quality is impressive for Bolivia, as I rarely have seen such sharp and gemmy crystals from any Bolivian locality. So far, this find was very limited.