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Andrrade iron mine showing iridescent hematite

Locality: Andrade Mine, João Monlevade, Iron Quadrangle, Minas Gerais, Brazil

Andrrade iron mine, João Monlevade, Iron Quadrangle, Minas Gerais, Brazil. Showing iridescent hematite. The iridescence is caused by a as unnamed nano phosphate mineral oriented on the tiny crystals of specular Hematite. Photo taken in 1987.

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Photo added: 15th Aug 2010

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