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Columbite-(Fe) Trimingham Coll.
- Keystone District, Pennington Co., South Dakota
- Thumbnail, 2.9 x 2.4 x 1.8 cm
- Start Time: 01/09/2014 6:30:00 pm (CST)
- End Time: 01/16/2014 6:30:00 pm (CST)
- Auction Closed
Item Description
Several faces of this lustrous, tabular, jet-black crystal are very sharply crystallized on this showy, excellent and highly representative example of the species from this well-known South Dakota pegmatite district. Ex Bob Trimingham Collection.