Marcasite FeS2 with Calcite Wisconsin
Marcasite FeS2 on Calcite, White Pine Mine, White Pine, Ontonagon Co., Michigan
Marcasite FeS2 with Quartz and Chalcopyrite, Casteel No. 35 Mine, Vibrunum Trend, Iron Co., Missouri
Marcasite FeS2 detail, with Quartz and Chalcopyrite, Casteel No. 35 Mine, Vibrunum Trend, Iron Co., Missouri
Marcasite FeS2 detail, with Quartz and Chalcopyrite, Casteel No. 35 Mine, Vibrunum Trend, Iron Co., Missouri
Marcasite FeS2 Brushy Creek Mine, Vibrunum Trend, Reynolds Co., Missouri
Marcasite FeS2 Brushy Creek Mine, Vibrunum Trend, Reynolds Co., Missouri
Marcasite FeS2 with Calcite Brushy Creek Mine, Vibrunum Trend, Reynolds Co., Missouri
Marcasite FeS2 on Dolomite, George W. MacLeod Mine, Wawa, Ontario, Canada
Marcasite FeS2 with Sphalerite, Brushy Creek Mine, Vibrunum Trend, Reynolds Co., Missouri
Marcasite FeS2 G.P. Materials South Quarry, Potosi, Washington Co., Missouri
Marcasite FeS2 with Dolomite, Brushy Creek Mine, Vibrunum Trend, Reynolds Co., Missouri
Marcasite FeS2 on Calcite, Linwood Mine, Scott Co., Iowa
Marcasite FeS2 Shullsburg, Lafayette Co., Wisconsin
Marcasite FeS2 Shullsburg, Lafayette Co., Wisconsin
Marcasite FeS2 with Dolomite, Brushy Creek Mine, Vibrunum Trend, Reynolds Co., Missouri
Marcasite FeS2 with Quartz, Elko Co., Nevada
Marcasite FeS2 with Quartz, Elko Co., Nevada