Quartz, sphalerite – marmatite, chalcopyrite, pyrite and chlorite

One fantastic, large cabinet size specimen, with double faces, presenting pyrite, overgrowth by quartz-rock crystal with very high brilliancy, and followed by very lustrous sphalerite – marmatite, chlorite, and chalcopyrite. Marmatite and chalcopyrite have tetrahedral habits. Borieva mine, Madan, Bulgaria
size 120 x 80 x 57 mm – weight 390 grams.