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Gratonite
13.5 x 10 x 7 cm / main crystal: 0.6 cm
(Autor: MIM Museum)

Excelsior Mine, Cerro de Pasco, Atacocha mining district, Pasco Province, Pasco Department, Peru
Gratonite
13.5 x 10 x 7 cm / main crystal: 0.6 cm
(Autor: MIM Museum)

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