Marcassite covering Baryte, from Lubin -Poland-

These beautiful warm tones of brown and gold are a crystallization of Marcasite around a Baryte nodule. These round minerals (botryoidal) -called "kidney-shaped minerals" in English- come from the Lubin mine in Poland, where 1,000 people work today in copper and silver mines. While digging, they sometimes discover hollow pockets whose walls are lined with these beige/brown Baryte nodules that form mini hills, and which have been covered with a layer of Marcasite. So an iron disulfide, golden as Pyrite. (lit is visible on the back of this piece). We recognize the characteristic lamella shape of the Baryte crystals in the heart of the nodules. And it is beautiful!