United Kingdom Wales 1553 Millerite, Chalcopyrite, Unknown, Eaglebrook Mine, Dyfed, Wales September 22, 2019
Europe Spain 4756 Millerite, Bellmunt del Priorat, Priorat, Tarragona, Catalonia, Spain October 5, 2019
Nevada North and Central Americas United States 0213 Millerite, Calcite, Grays Quarry, Hamilton, Hancock Co., Illinois September 18, 2019