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Gaudefroyite
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| Mineral: | Gaudefroyite: Ca4Mn+++3-x(BO3)3(CO3)(O,OH)3 | ||||
| Comments: | Dark gray, prismatic gaudefroyite with crystals to 1.5 cm. | ||||
| Location: | N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. | ||||
| Scale: | 7.8 x 4.2 cm. | ||||
| Copyright: | © John Veevaert | ||||
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