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File:Chalcanthite-Copper-pas-178d.jpg

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Description
English: Chalcanthite, Copper
Locality: New Rambler mine (Rambler Mine; Holmes Mine; Electrolytic Mine; Great Rambler Mine), New Rambler District, Albany County, Wyoming, USA (Locality at mindat.org)
Size: large cabinet, 22.7 x 13.4 x 11.4 cm
Chalcanthite with COPPER replacing Wood
The Rambler mine was in its heyday by 1900 or so, and continued for a number of years afterwards to dominate copper production in this region. This particular specimen is the only Chalcanthite of any kind that I have personally seen from the state (and this is the only listed locality likely to have produced such a piece, although the label accompanying just says "chalcanthite - wyoming - natural"). The specimen carries an old label from dealer Gary Hansen. Could it be formed from mine run-off? It DOES have the look of deposition from flowing solution, but this could have formed naturally, as the label says, during flow of water through the mine, completely unrelated to human mining. As with another museum chalcanthite of large size in this collection, I am disinclined to think these to be manmade fakes - something I would be very suspicious of today from contemporary mining locations. So, which is it? The giveaway is the presence of COPPER-REPLACED wood, embedded in the chalcanthite at the bottom and rear of the specimen. No kidding, if you knock on it with a key or finger, the slender wood timber clinks like metal. The replacement is not 100% complete, as the wood is still somewhat malleable/bendable, but it is far enough along that you can say the copper has replaced much of the wood. So, we have a naturally formed example of chalcanthite, not made on a lab table - but formed postmining from the runoff of the copper-laden waters running over old mine timbers. In any case, it is a huge, beautiful, breathtakingly colorful display specimen!
Deutsch: Chalkanthit, Kupfer
Fundort: New Rambler mine (Rambler Mine; Holmes Mine; Electrolytic Mine; Great Rambler Mine), New Rambler District, Albany County, Wyoming, Vereinigte Staaten (Fundort bei mindat.org)
Größe: 22.7 x 13.4 x 11.4 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-178d.jpg, Description: http://www.irocks.com/render.html?species=Copper&page=55
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
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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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