CALITE - CaCO₃ Nice large, twinned, Calcite on Pyrite matrix.  From the famous Sokolovskity Mine, Ruddnity City, Near The Tobel River, Kustenay Oblast, North Kazakhstan Republic. This specimen is clean and sharp and is 4 cm (1-9/16") wide by 4 cm (1-9/16") deep by 4 cm(1-9/16") high.