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Quartz, Calcite (variety manganoan), Manganite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
5.6 x 4.6 cm
(Author: am mizunaka)
| Dimensions: | 1600 x 1531 |
| File size: | 517.23 kbytes |
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