Banded quartz-hematite ore

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Braz. In the Itabira Region of Minas Gerais, schistose, specular hematite forming alternate bands with sugary quartz. Some of the beds are auriferous and contain gold-palladium alloys with manganese oxides, native copper, and talc. Writers have given the rocks various names, such as iron-glance schist, jacutinga, quartz itabirite, and bandererz. Hess

Source: Dictionary of Mining, Mineral, and Related Terms


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