This Specimen has been sold.
5.9" Polished Schalenblende Slice - Poland
This particular specimen was mined out of Olkusz, Poland, and contains a beautiful combination of sphalerite and marcasite, with galena visible along the side and underside of the specimen.
Schalenblende is a compact mass of sulfides, and can consist of galena, pyrite, wurtzite, marcasite and even sphalerite. It forms in concentric layers, and is believed to have formed by means of crystallization from a sulfide gel.