Ullmannite

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This superb rarity features SHARP and LUSTROUS crystals to a full centimeter, perched up in a mound to make for one of the more display-worthy and least ugly and massive specimens of this material I have yet seen (even in museums, all of which want one). Sarrabus is a very important, ancient silver district. Ullmannites are one of those rare bystanders that so sadly, few were saved of. What is amazing about this specimen is that the piece actually has some display aesthetics whereas most are embedded in massive, ugly ore. I have seen a number of these in museums and in dispersals of old European collections, and out of all this is not the most expensive by any means, but is one of my favorites for its overall combination of qualities. From the collection of Gianguido Giannobi.