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Madrelena Mine, Tres Pozos, Baja California, Mexico
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Sanbornite and Gillespite, Madrelena Mine, Tres Pozos, Baja California, Mexico. Specimen 7×6×2 cm, featuring several carmine-red patches of Gillespite, a barium and iron silicate, within a pearly white matrix of Sanbornite, a barium silicate.