Copper (Var: Whitneyite)
Miniature, 4.8 x 3.1 x 2.8 cm
Calumet Township, Houghton Co., Michigan, USA

According to, whitneyite is variety of copper containing up to 11.5% arsenic, with some intimately intergrown algodonite, and not a distinct species. The blue smudge is perhaps azurite. A nice massive sample of the material. Ex. Richard Hauck Collection.