chalybite


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chalybite

(kăl`əbīt'): see sideritesiderite
or chalybite
, a mineral, varying in color from brown, green, or gray to black and occurring in nature in massive and crystalline form. A carbonate of iron, FeCO3, it serves as an iron ore, especially in the British Isles.
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chalybite

[′kal·ə‚bīt]
(mineralogy)
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