beautiful green malachite on on a black background

amethystine bijou cap carbonate carbuncle commercial copper crocidolite crystal crystalline cuco3oh2 cut deposit deposits druse extractive face facing faux gem gemmary gemmology gemology gems gemstone grass green hardstone hyacinth malachite mineral mineralogy mining mountain noddle ore ornamental pea peacock polished precious product sapphirine semi semiprecious simple sophomoric stone stones tenderfoot trim useful verdant verdured