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Olmsteadite Image

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Large Olmsteadite Image

Mineral: Olmsteadite: KFe++2(Nb,Ta)(PO4)2O2ยท2(H2O)
Comments: Dark brown crystals of olmsteadite with jahnsite on siderite.
Location: Big Chief mine, Keystone, Penningtion County, South Dakota, USA.
Scale: Not Given.
Copyright: © Lou Perloff / Photo Atlas of Minerals
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