Dims: 3.4" x 2.6" x 1.6"
Wt: 5.79 oz.(164.1 g)
Gold Hill Mine, Tooele County, Utah, U.S.A.
This specimen shows a thin bright green crust of Conichalcite on a matrix that shows both brown and pale blue coloration. The Conichalcite is in both a massive and a botryoidal form. It has no luster and no detectable transparence or translucence. The matrix that it rests upon appears to be made up of some type of shale or mudstone, but I cannot be certain. The blue colored material that is scattered throughout it is apparently a member of the kaolinite mineral group called halloysite.