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Olmiite with Oyelite - N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa (Type Locality)
(#:MINS8773)
Specimen with orange-pink glassy crystals of Olmiite up to 1,0 cm wide on matrix with several white Oyelite xls up to 2 mm in association.
Formula :
(Ca,Mn
2+
[SiO
3
(OH)](OH)
System:
orthorhombic
Hardness:
5
Rarity:
very rare
Strunz id:VIII/B.22-25 - SILICATES
Name origin:
Named for Filippo Olmi (CNR, Centre di Studio per la Minerogenesi ela Geochimica Applicata, Florence, Italy)
Specimen weight:15 gr.
Crystal size:Up to 1,0 cm wide
Overall size: 35mm x 25 mm x 14 mm
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