On the edge of the specimens, however, the white folia of granular quartz will be visible.
2.
The term was originally applied in Itabirito ( Pico de Itabirito ), in the state of Minas Gerais and southern part of Belo Horizonte, Brazil, to a high-grade, massive specular hematite ore ( 66 % iron ) associated with a schistose rock composed of granular quartz and scaly hematite.
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