Siderite after Calcite - Turt Mine, Satu Mare, Maramures Co., Romania Brown sparkling crystals of si
Siderite after Calcite - Turt Mine, Satu Mare, Maramures Co., Romania Brown sparkling crystals of siderite replacing larger rhombohedral crystals of what were once calcite, these measuring to 3.5 cm on edge, all over a crystallized quartz matrix. The calcite is now completely gone. -- source link
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