An outstanding skeletal galena crystal 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 cube is matt. It is well formed and it has a sharp geometry. On the galena are seen black sphalerite crystals. In excellent condition.

Overwhelming skeletal galena!