Powellite
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Basalt plate covered on one face with 16 translucent, pale yellow powellite crystals having developed on quadratic apophyllite blocks of a pale beige color, with some pale yellow-orange stilbites and white scolecite balls.
Basalt plate covered on one face with 16 translucent, pale yellow powellite crystals having developed on quadratic apophyllite blocks of a pale beige color, with some pale yellow-orange stilbites and white scolecite balls.
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