Malachite

[mælәkait]

(noun.) a green or blue mineral used as an ore of copper and for making ornamental objects.

Typed by Geraldine--From WordNet

(n.) Native hydrous carbonate of copper, usually occurring in green mammillary masses with concentric fibrous structure.

Checker: Shelia

n. a green-coloured mineral composed essentially of carbonate of copper much used for inlaid-work.

Checker: Melva