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Sapucaïa, Brazil
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Metastrengite on frondelite, Sapucaïa, Brazil. Set within a brown, fibrous, crystallised frondelite matrix, an iron and manganese hydroxyphosphate, a magnificent metastrengite geode with violet crystals, an iron phosphate. An excellent specimen for macro photography. Handwritten label from the Barrais collection, likely purchased from Deyrolle.