In this specimen we can observe several cubic galena crystals, very brilliant and defined, with faces of the cube truncated by the octahedron. They are accompanied by complex sphalerite spinel twin crystals. Disposed on a matrix with quartz and lenticular calcite crystals.

From a Bulgarian mine rarely represented in collections we offer this interesting specimen of pyrite with very unusual cubic forms. The crystals have a tabular shape with terminal faces of the octahedron. They are very aerially disposed on a matrix with quartz crystals. A crystallographic and locality rarity.

Find "different" specimens from Madan is a laborious work but, sometimes, very satisfactory. In this sample we see two galena crystals of cubic habit with slightly rounded edges and faces with rare hopper growth. To add more interest we can observe in vertices octahedron faces. Good luster, metallic gray color and disposed very aerial and aesthetics on a matrix of sphalerite crystals with several twins, polysynthetic growths on faces and excellent brilliance. Also numerous brilliant chalcopyrite crystals. A different specimen from a classic Bulgarian locality.

A very curious group of cube-octaedral Galena crystals showing well defined edges and faces with some curved holes. Sphalerite crystals show the tetrahedron forms and honey transparences on sharp edges. Some of them are interpenetrated and covering the Galena. Really interesting specimen.

Group of Galena crystals from an old mine in the area of Madan. This specimen shows well-developed cubic forms in staggered growth with defined edges and complex growths on faces. Its metallic luster has the original brightness of these original specimens and we decided to preserve. We would like to emphisize a group of very bright sphalerite crystals of intense honey color, near to black, showing tetrahedral forms and truncated  on vertices.

This is a sample of the first specimens collected from the area of Madan and belonged to a miner collection, with no more data.