TT87AL4: Polycrystalline group, quite sharp compared to the usual for the species of Ferrokësterite, a rare copper, iron and tin sulfide, associated with a lighter metallic gray Andorite crystal. On a matrix covered with small, very bright crystals of Pyrite. The specimen comes from the Robert J. Noble collection, whose label, which states that it previously came from Alfredo Petrov (Tucson 2009), we will send to the buyer.
San José Mine, Oruro City, Cercado Province, Oruro Department Bolivia
Specimen size: 2.9 × 2.7 × 1.8 cm = 1.14” × 1.06” × 0.71”
Main crystal size: 1.3 × 1 cm = 0.51” × 0.39”
Former collection of Bob Noble
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