ncat JP2975 Marcasite, Anglezarke Mines, Chorley, Lancashire, England, UK October 8, 2019 Steve England Lancashire United Kingdom
Illinois North and Central Americas United States ncat JP928, Marcasite, Mount Carroll Quarry, Mount Carroll, Carroll Co., Illinois, USA September 23, 2019
New Jersey North and Central Americas United States 4553 Marcasite, Franklin, New Jersey, USA October 5, 2019
Canada North and Central Americas ncat JP0518 Dolomite, Calcite, Marcasite, Barite, Lincoln Quarry (Beamsville Quarry), Clinton Township, Lincoln Co., Ontario, Canada October 11, 2019
