| Collector Specimen Matches |
| US |
| Alabama |
| MARCASITE crystals * Alabama * Ex. Barratt Phillips Collection - , AL US |
| Iowa |
| SWEET MARCASITE and CALCITE: LINWOOD MINE, BUFFALO, SCOTT CO., IOWA - NR! - , IA US |
| SWEET MARCASITE INCLUDED CALCITE: LINWOOD MINE, BUFFALO, SCOTT CO., IOWA - NR! - , IA US |
| SWEET MARCASITE INCLUDED CALCITE: LINWOOD MINE, BUFFALO, SCOTT CO., IOWA - NR! - , IA US |
| STACKED CRYSTAL MARCASITE: LINWOOD MINE, BUFFALO, SCOTT COUNTY, IOWA, USA - NR! - , IA US |
| STACKED CRYSTAL MARCASITE: LINWOOD MINE, BUFFALO, SCOTT COUNTY, IOWA, USA - NR! - , IA US |
| Michigan |
| UNUSUAL Star-shaped Marcasite Crystals on Quartz MAGMONT MINE, MISSOURI - , Mi US |
| MINERALS : TWO GENERATIONS OF MARCASITE CRYSTALS FROM MISSOURI, USA - , Mi US |
| Missouri |
| MARCASITE crystals on Galena * Joplin * Missouri - Joplin, MO US |
| MINERALS : CALCITE CRYSTALS ON MARCASITE CRYSTALS FROM MISSOURI, USA - , MO US |
| MARCASITE crystals with Calcite * Brushy Creek Mine * Missouri - , MO US |
| MINERALS : IRIDESCENT BLUE CHALCOPYRITE CRYSTALS ON MARCASITE XTLS, MISSOURI - , MO US |
