Reddish brown areas amongst other yellow uranium alterations
Silver metallic ianthinite with purplish tint, other yellow U minerals
associated, unidentified.
Origin: Grube Menzenschwand, Schwarzwald, Germany
Sample size: 2 x 1.5 x 1.5 cm (top), 3.5 x 2 x 1 cm (bottom)
Yellow crusts, rich on matrix. Acquired by Kidwell in 1959 from the French
Geological Institute.
Origin: Bois Noir, France
Ex. Kidwell colleciton
Sample size: 5 x 4 x 2 cm
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