標 本 名: | オルミ石 (Olmiite) / バルトフォンティン石 ( Bultfonteinite )
| 化学組成: | CaMn2+[SiO3(OH)](OH) / Ca2[F|HSiO4] | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, 南アフリカ( South Africa) | Here you get a rare mineral which was officially recognized as mineral in 2006: A botryoidal olmiite crystal with great transparency or translucency. Beside the olmiite, small radial needlelike bultfonteinite crystals are attached. Great fully intact specimen with great luster from South Africa.
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