Freibergite is an uncommon sulfosalt that contains Silver and Antimony, among other things. I would be remiss if I didn't begin by emphasizing that this single, subhedral crystal is HUGE for the species. Between its size, fine luster, and slightly brassy patina, the quality of this crystal rivals the very best Freibergites from Colorado and Bolivia. Add to it the 2-mm sized Bournonites that decorate the main face of the Freibergite, and you have here what is undoubtedly a world-class miniature. Even better in person.