This Specimen has been sold.
Gemmy, Blue-Green Cuprian Adamite Crystals - Greece
This is a beautiful specimen of gemmy, blue-green cuprian adamite crystals collected from the Kamariza Mine in Lavrion, Greece. These crystals formed as a thin druze on this limonitic matrix.
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.