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Thaumasite: Ca3Si(CO3)(SO4)(OH)6·12(H2O)
Comments: Doubly-terminated Thaumasite. Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 1 cm across. © John Veevaert
Comments: Transparent crystal of thaumasite. Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 1.1 x 0.4 cm. © John Veevaert