Dims: 3.0x1.8x1.4" (7.6x4.6x3.6cm)
Wt: 4.2oz (120g)
General Thomas Mine, Paymaster District, Nye County, Nevada, USA
This porous host rock displays many clusters of aquamarine colored aurichalcite crystals. While much of the aurichalcite is in the form of fuzzy crusts (consisting of dense clusters of tiny acicular crystals), the best crystals are large enough to be examined even without a loupe. These, too, are in radial clusters, but these clusters are loose, revealing that the aurichalcite is transparent enough that the crystals appear white individually, but a deep aqua blue at the base of each spray, where they cluster together. The host rock contains both limonite and goethite (some of the goethite is excellent), and probably other minerals as well (I am really intrigued by a nearly hexagonal curved dull black plate - it may be hematite). There are also many colorless transparent crystals that look like hemimorphite.