1.6" Vibrant Blue Chalcanthite - Planet Mine, Arizona

This is a 1.6" wide association of vibrant blue, fibrous chalcanthite and white halotrichite, collected from the Planet Mine in Arizona. It has been mounted to an acrylic display base with glue.

Natural chalcanthite can be hard to come by and is considered relatively rare. The chemical composition of this mineral is CuSO4 · 5H2O, meaning it forms in oxidative zones of copper mines. When naturally formed, the crystals are usually botryoidal, tabular and/or prismatic in shape. Chalcanthite crystals have also been known to form in veins as masses of parallel fibrous crystals, and will typically display a vibrant blue coloration.

Chalcanthite crystals are relatively simple to form synthetically, meaning that fake specimens that have been listed as natural, unfortunately are on the market.
Chalcanthite & Halotrichite
Planet Mine, La Paz County, Arizona
1.6 x 1.3"