Galenite, sphalerite

The galena in this specimen forms steel-gray, metallic-luster cubic crystals that reach a size of up to 1.7 cm. These crystals occur in this specimen together with diamond-luster, metallic crystals of sphalerite. Due to the high luster of the sphalerite, the specimen is very attractive and impressive. The specimen comes from the Madan locality in Bulgaria and was collected in 2011.