kidney ore


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Related to kidney ore: red hematite

kidney ore

n
(Geological Science) geology a form of hematite that occurs in kidney-shaped masses
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References in periodicals archive ?
Much high-quality hematite, including "kidney ore" and "pencil ore," and also fine specimens of quartz, calcite and barite were recovered.
It was particularly rich in crystal-lined cavities containing fine specimens of calcite, dolomite, quartz, specular hematite and "kidney ore" (for which the mine became especially famous).
Although the mineral contents of cavities opened in the nearby Windergill and Eskett mines were not recorded, the dumps contained good examples of hematite "kidney ore" and quartz crystals.