Limonite, Siderite, Pyrite
Cabinet, 12.7 x 10.8 x 7.2 cm
Kami Mine, Ayopaya Province, Cochabamba Department, Bolivia
This is a very interesting specimen of Limonite forming incredible "casts" after rhombic Siderite and octahedral Pyrite crystals. The sharpness and detail is so amazingly well preserved, yet upon close inspection, one can clearly see that these cavities are hollow inside.