Cassiterite, Muscovite

Unknown Owner

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An aesthetic specimen of a 3.3 cm, lustrous, striated, twinned, black cassiterite crystal jauntily set upright on a matrix of pearlescent muscovite plates and nicely accented by smaller, twinned cassiterite crystals. This excellent piece is from the less well-known, but classic Spanish locality for cassiterite of the Penouta Mine, Galicia. Ex. Nelson Collection.