Vibrant Blue Chalcanthite - Planet Mine, Arizona

 
This is a natural chalcanthite specimen, collected from Planet Mine in Arizona. The vibrant blue crystals on this specimen formed as thin parallel fibers, some of which have visible terminations.

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.
DETAILS
SPECIES
Chalcanthite
LOCATION
Planet Mine, Arizona
SIZE
2.2" wide
SUB CATEGORY
ITEM
#60787