Friday, June 22, 2012

Gemstone of the Week: Chalcanthite

(Lap grown sample of Chalcanthite; image from:
 More images of Chalcanthite

Chalcanthite is a type of copper sulfate and occurs in the oxidized zone of copper deposits.  Its name means "copper flower" and comes from the Greek words khalkos (copper) and anthos (flower).  Chalcanthite is a brilliantly intense peacock-blue and used to be known as blue vitriol.  While it will most often form as veinlets, massives, and stalactite aggregates, Chalcanthite will also form as crystals, although these natural crystals are quite rare.  Chalcanthite commonly forms as crusts or stalactites on the timbers and walls inside of mines having crystallized from the mine waters.  In Chile (and other arid areas), Chalanthiteis mined as a copper ore.


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    1. Hmm. That's odd, I went to check if I needed to fix the image, but it seems to be working again, or at least it is on my computer.