Outstanding skeletal galena crystals from this closed mine - 9th Septemvri mine, Madan ore field, Bulgaria – the only one that makes these structures. The skeletal structure is caused by very fast growth of the mineral where the crystal faces do not have the time to be completed, because the edges grow faster than the center of the faces. It displays very attractive stepped growth, forming gorgeous terraced structures on all faces. The galena cubes are matt. It is well formed and it has a sharp geometry. On the galena are seen small quartz crystals proving the natural origin of the skeletal structures. Some black sphalerite is seen too. In very good condition – some natural imperfections and fractures.

Overwhelming skeletal galena!