| NAME | CHALCOPYRITE Copper Iron Sulfide |
| Formula | CuFeS2 |
| Crystal System | Tetragonal |
| Location | Coahuila, Mexico |
| Data | Ex. P. R. Cosminsky collection; 1985 |
| Photographer | Robert Klopfer / Alexander Kopylov |
Micromounts
Dioptase
| NAME | DIOPTASE Hydrous Copper Silicate |
| Formula | Cu6Si6O18 • 6H2O |
| Crystal System | Hexagonal Rhombohedral |
| Location | Table Mountain Mine, Pinal Co., Arizona, USA |
| Data | Ex. J. Ulinski collection; 2007 |
| Photographer | Robert Klopfer / Alexander Kopylov |
Dolomite-Quartz
| NAME | DOLOMITE Calcium Magnesium Carbonate |
| Formula | CaMg(CO3)2 |
| Crystal System: Hexagonal Rhombahedral | |
| Location | Warsaw, Hancock Co., Illinois, USA |
| Data | Ex. P.R. Cosminsky collection; 1985 |
| Photographer | Robert Klopfer / Alexander Kopyhlov |
Hemimoprhite
| NAME | HEMIMORPHITE Hydrous Zinc Silicate |
| Formula | Zn2Si2O7(OH)2•H2O |
| Crystal System | Orthorhombic |
| Location | Mina Ojuella, Mapimi, Durango, Mexico |
| Data | Ex. P. R. Cosminsky collection; 1985 |
| Photographer | Robert Klopfer / Alexander Kopylov |
Marcasite
| NAME | MARCASITE Iron Sulfide |
| Formula | FeS2 |
| Crystal System | Orthorhombic |
| Location | Francon Quarry, Montreal, Canada |
| Data | Ex. J. Ulinski collection; 2007 |
| Photographer | Robert Klopfer/Alex Kopylov |
Millerite
| NAME | MILLERITE Nickel Sulfide |
| Formula | NiS |
| Crystal System | Hexagonal Rhombohedral |
| Location | Halls Gap Kentucky |
| Data | Ex. J. Ulinski collection; 2007 |
| Photographer | Robert Klopfer / Alexander Kopylov |
Mimetite
| NAME | MIMETITE Lead Chloro-Arsenate |
| Formula | Pb5(AsO4)3Cl |
| Crystal System | Hexagonal |
| Location | San Pedro, Corralitos, Chihuahua, Mexico |
| Data | Ex. P. R. Cosminsky Collection, 1985 |
| Photographer | Robert Klopfer / Alexander Kopylov |
Mimetite
| NAME | MIMETITE Lead Chloro-Arsenate |
| Formula | Pb5(AsO4)3Cl |
| Crystal System | Hexagonal |
| Location | Tsumeb, Namibia |
| Data | Ex. F. A. Keidel collection; 2004 |
| Photographer | Robert Klopfer / Alexander Kopylov |
Pyrite
| NAME | PYRITE Iron Sulfide |
| Formula | FeS2 |
| Crystal System | Isometric |
| Location | Sylacauga Talladega Co, Alabama |
| Data | Ex. P. R. Cosminsky Collection, 2012 |
| Photographer | Robert Klopfer/Alexander Kopylov |
Pyrite
| NAME | PYRITE Iron Sulfide |
| Formula | FeS2 |
| Crystal System | Isometric |
| Location | Niaca, Chihuahua, Mexico |
| Data | Ex. F. A. Keidel Collection, 2004 |
| Photographer | Robert Klopfer / Alexander Kopylov |