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