[named 1851; < Greek χαλκώδης like copper + -itesuffix1] a hydrous silicate of iron, found in velvety coatings, having a brass-like lustre, a variety of stilpnomelane.
ΚΠ
1857 C. U. ShepardTreat. Mineral. (ed. 3) Chalcodite.
1868 J. D. DanaMin. (1880) 460 Brush ascertained the identity of chalcodite and stilpnomelane.