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Description
English: Chalcanthite
Locality: Braden Mine (Teniente Mine), El Teniente, Rancagua, Cachapoal Province, Libertador General Bernardo O'Higgins Region, Chile (Locality at mindat.org)
Size: cabinet, 13.4 x 11.3 x 8.7 cm
Chalcanthite
Maybe there are better, but I do not know of them. This is the largest and best crystallized natural chalcanthite that I have personally seen. It has a huge complete crystal of neon blue, sticking straight up from matrix. It is pristine, dramatic, glows when backlit, and is from an oldtime and romantic locality. Bottom line, though, it is just "pretty!" Chalcanthite is easily synthesized today and grown in labs all around the world for the gift shop and fake rock markets. Chalcanthite forms as postmining or manmade crystals from working copper mines such as in Arizona. It can be bought in the Smithsonian gift shop and grown from powder on the kitchen table. However, aside from the chance that this was postmining (and i do not think it was), my bet is they were not making these in labs and from gift shop chemistry sets back in the early 1900s in Chile. With as many copper mines as we have around, I have not seen any postmining chalcanthite formed from the runoff of human workings, that reaches this magnitude. So i find it unlikely this was formed in that manner, although its a slim outside chance. This is, surely then, natural as the museum itself concluded in the end: certainly one of the most dramatic examples of the species I can imagine. The wooden display label with it indicates exhibition in a case of trophies on return from one of the famous Vaux expeditions of the 1920s, apparently. Note another, clearly post-mining (but naturally made) American chalcanthite of substantial size in this update (PAS-178), as well.
Deutsch: Chalkanthit
Fundort: Braden Mine (Teniente Mine), El Teniente, Rancagua, Provinz Cachapoal, Región del Libertador General Bernardo O’Higgins, Chile (Fundort bei mindat.org)
Größe: 13.4 x 11.3 x 8.7 cm
Date before March 2010
date QS:P,+2010-03-00T00:00:00Z/7,P1326,+2010-03-00T00:00:00Z/10
Source Image: http://www.irocks.com/db_pics/pics/pas-167b.jpg, Description: http://www.irocks.com/render.html?species=Chalcanthite&page=0
Author
Robert M. Lavinsky  (1972–)  wikidata:Q56247090
 
Alternative names
Robert Matthew Lavinsky; Lavinsky, Robert M.; Lavinsky R M
Description American mineral collector and mineral dealer
iRocks.com (Mineralogical Record)
Date of birth 13 December 1972 Edit this at Wikidata
Location of birth Columbus
Authority file
creator QS:P170,Q56247090
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Rob Lavinsky, the copyright holder of this work, hereby publishes it under the following license:
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Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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