Calcite : CaCO3, Goethite : α-Fe3+O(OH)

minID: W2U-FM0

Calcite : CaCO3, Goethite : α-Fe3+O(OH)

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A couple of twinned rhombehedral groups of calcite with oxidized goethite in the highly altered orange andesite. The area's also good for siderite roses/stacks with frosty calcite rhombs. The one in front is 3 in. between points. Taken quickly as a mineral rescue operation was underway with the excavator coming 'tomorrow'. end of 2003

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Photo added: 13th Nov 2009