Ex. Grenier collection
Origin: Hugo mine, Pennington Co., South Dakota, U.S.A.(type locality)
Sample size: 2 cm x 8 mm x 4 mm (top left), 3 x 3 x 2 mm (top right), 1.5 x
1.5 x 1cm (bottom)
Photo courtesy of:
Photo courtesy of:
Tom Loomis
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