an·na·berg·ite \ˈanəˌbərˌgīt\noun (-s) Etymology:Annaberg, Saxony, Germany, its locality + English -ite : a mineral consisting of a hydrous nickel cobalt arsenate (Ni,Co)3(AsO4)2.8H2O occurring in apple-green masses or capillary crystals and isomorphous with erythrite