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Bultfonteinite with Olmiite - N'Chwaning II Mine, Kuruman, Kalahari manganese field, Northern Cape, South Africa
(#:MINS9231)
Silky tufts of Bultfonteinite up to 3 mm richly set on matrix with beige Olmiite xls up to 4 mm. Rare combo difficult to find nowadays on the market.
Formula :
Ca
2
[F/SiO
3
(OH)] * H
2
O
System:
triclinic
Hardness:
4½
Rarity:
rare
Strunz id:VIII/B.22-40 - 8 : Silicates
Name origin:
For the Bultfontein mine, Kimberley, South Africa, where it was first discovered.
Specimen weight:5 gr.
Crystal size:Up to 3 mm
Overall size: 28mm x 20 mm x 10 mm
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