As a rule, black Sphalerite is not a very desirable mineral, but this one is something special! Lusterous and sharp glassy Sphalerites to almost 3 CM are decorated with treelike growths of slender quartz crystals. In great condition and with killer esthetics, the Sphalerites are well positioned and show complex growth hillocks on many faces. Careful examination finds only minor edge wear on some sphalerites, nothing distracting from the impact of this piece. Great for this specie and exceptional for this famous mineral region!