This pyrrhotite is from Dal’negorsk in the Kavalerovo Mining District, Primorskiy Kray, Far Eastern Region, Russia. This region contains nine known deposits in which 190 minerals including pyrrhotite can be found. It is a sulfide containing the elements Fe and S. This specimen consists of a predominately sphalerite crystal matrix with minor quartz and several pyrrhotites. It hosts a primary crystal that measures 1 3/8 inches across and also contains a stacked “coin” cluster on the reverse side (photo 5). The piece measures 3 x 2 1/4 x 1 7/8 inches or 76 x 57 x 48 mm.