From: Madan Ore Field, Rhodope Mts., Smolyan Oblast, Bulgaria.
 
 
Aggregate of yellowish and translucent crystals of Cleophane (the most zinc-bearing variety of Sphalerite) with darker crystals of Marmatite (the black iron-rich variety of Sphalerite ). Sample measuring 25 x 14 x 7 cm and weighing 2493 grams.