Fluorite with Siderite - Lutherschacht pit near Altfalter / Wölsendorf, Germany
 
 Green, partly purple fluorite from the Lutherschacht mine near Altfalter / Wölsendorf, Germany. Some fluorites are coated with quartz crystals at the edges. Together with siderite and chalcopyrite, a typical paragenesis forms from this locality. The piece is 9 cm long and 7 cm wide.