標 本 名: | タンタル石, [こようたい] : 鉄タンタル石 - マンガンタンタル石
| 化学組成: | FeTa2O6 - MnTa2O6 | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Darra-i-Pech (Pech; Peech; Darra-e-Pech) Pegmatite Field, Nangarhar (Ningarhar) Province, アフガニスタン (Afghanistan) | This is a fairly big manganese- tantalite crystal still hosting a small amount of muscovite matrix. The piece is irregular crystallized but shows no fracture planes, only under the microscope very few tiny fracture planes at some edges are visible. In transmitted light the specimen shows a beautiful deep red translucency. A rare transparent tantalite from Afghanistan.
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