4.5" Green, Cuprian Adamite Crystals on Matrix - Ojuela Mine, Mexico

This is a beautiful specimen of sparkling green, cuprian (copper-bearing) adamite crystals on a limonite matrix, collected from the Ojuela Mine in Durango, Mexico.

The entire specimen measures 4.5 x 2.5" and comes with an acrylic display stand.

Adamite is a basic zinc arsenate with the base chemical formula of Zn2(AsO4)(OH). When impurities are present in the mineral, the color is altered, explaining the wide variety of colors that adamite displays. Copper and Cobalt are some of the known impurities that can give mineral specimens a green (Cu) to pink/red (Co) color. Adamite is typically found imbedded in a limonite matrix, formed as a secondary mineral in oxidation zones of hydrothermal replacement deposits.
Adamite var. Cuprian Adamite
Ojuela Mine, Mapimi, Durango, Mexico
Entire specimen 4.5 x 2.5"