Locality: Krushev Dol Mine (450 m level), Madan ore field, Smolyan Oblast, Bulgaria
Size: 58 mm x 32 mm x 29 mm (2.3 in. x 1.3 in. x 1.1 in.)
Weight: 107 g (3.8 oz.)
Very lustrous specimen of sphalerite with crystals to 7 mm and galena to 8 mm. The sphalerite appears black under overhead lighting, but is a dark olive green color when backlit.