chalybite

from WordNet (r) 3.0 (2006)
chalybite
    n 1: iron ore in the form of ferrous carbonate [syn: {siderite},
         {chalybite}]
from The Collaborative International Dictionary of English v.0.48
Chalybite \Chal"y*bite\, n. (Min.)
   Native iron carbonate; -- usually called siderite.
   [1913 Webster]
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