Sphalerite with Chalcopyrite and Quartz

Mogilata Deposit, September Mine (9th of September Mine) , Madan mining area, Rhodope Mountains, Smolyan Oblast  Bulgaria (1992)

Specimen size: 8.5 × 7.6 × 3.4 cm = 3.35” × 2.99” × 1.34”
Main crystal size: 2 × 1.8 cm = 0.79” × 0.71”