Columbite-(Fe)-Columbite-(Mn) Series
Epping, Rockingham County, New Hampshire, USA
4.7 x 4.7 x 2.2 cm. A rare and excellent old crystal from a long-closed locale and the University of Arizona Collection. This splendent, two-sided, jet-black, well-terminated crystal has great form with striking, curved stepped-growth lines. A superb rarity. The town of Epping was incorporated in 1741.
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