Gallery:  Ca-Mg-Fe carbonates

Calcite on basalt

Siderite (Ivigtut cryolite deposit, Greenland)

Ankerite (Erzberg Eisenerz, Steiermark, Austria)

Magnesite (Serra Das Eguas, Brumado, Bahia, Brazil)

Ankerite (Erzberg Eisenerz, Steiermark, Austria)

Breunnerite (Chebarkul region, Russian Federation)

Ankerite (Pulaski Co., AR, USA)

Ferroan dolomite (St. Eustache, Quebec, Canada)

Ferroan dolomite (Nanisivik Mine, Baffin Island)

Sidero-magnesite (Morro Velho Mine, Brazil)