- Bournonite, Siderite, Pyrite
- Toenail, 3.0 x 3.0 x 2.3 cm
- Machacamarca Mine, Machacamarca, Machacamarca District (Colavi District), Cornelio Saavedra Province, Potosi Department, Bolivia
This specimen was collected in very recently (within the last few months - 2009). It hails from one of the most exciting Bolivian localities of the last 10 years. It hosts several attractive, sharp, tabular, metallic, silvery-grey color crystals with great form and sharp faces. The crystals are sitting amongst golden Siderite and sparkling Pyrite matrix. For the quality, these new specimens have created a lot of excitement, so much so that one of the best pieces was featured on the cover of the March/April 2009 Issue of the Mineralogical Record. This specimen is from the same mine and possibly the same exact pocket as the cover specimen.