Home > American Minerals III – May 26 > MS1570 Olmsteadite
Olmsteadite
- Big Chief mine
- Keystone
- Pennington County
- South Dakota
- U.S.A.
- 1.8 by 1.3 by 1.0 cm – Thumbnail specimen (fits into a 2.5 cm cube)
Olmsteadite is a niobium bearing phosphate mineral (Moore et al., 1976). The mineral name honors Milo Olmstead (1909-2005), a micro-mineral collector who called attention to the mineral. Olmsteadite here forms a red-brown crystal fragment, 1 mm across, embedded in crystalline siderite. A vintage green Cureton Mineral Company label accompanies the specimen. Type locality.
Price: $50
Item code: MS1570
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