bice
Webster's Dictionary (GCIDE)
Bice \Bice\, Bise \Bise\, n. [F. bis, akin to It. bigio light gray, tawny.] (Paint.) A pale blue pigment, prepared from the native blue carbonate of copper, or from smalt; -- called also blue bice. [1913 Webster]
Green bice is prepared from the blue, by adding yellow orpiment, or by grinding down the green carbonate of copper. --Cooley. --Brande & C. [1913 Webster]