Annabergite is an arsenate mineral consisting of a hydrous nickelarsenate, Ni3(AsO4)2ยท8H2O, crystallizing in the monoclinic system and isomorphous with vivianite and erythrite. Crystals are minute and ...
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capillary and rarely met with, the mineral occurring usually as soft earthy masses and encrustations. A fine apple-green color is its characteristic feature. It was long known (since 1758) under the name nickel bloom; the name annabergite was proposed by H. J. Brooke and W H. Miller in 1852, from Annaberg in Saxony, one of the localities of the mineral. It occurs with ores of nickel, of which it is a product of alteration. A variety, from Creetown in Kirkcudbrightshire, in which a portion of the nickel is replaced by calcium, has been called dudgeonite, after P. Dudgeon, who found it.