File:Villiaumite-mrz289b.jpg

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Description
English: Villiaumite
Locality: Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia (Locality at mindat.org)
Size: small cabinet, 6.6 x 5.8 x 4.5 cm
Villiaumite
An outstanding large specimen from this important locality, featuring seemingly terminated villiaumite crystals in a cluster. However, I was wrong in my judgment of this. Marty's label notes the presence of Fersmanite which may be here, as well. Although beautiful and seemingly cubic, most specimens of villiaumite of any size are simply cleavage fragments, as a customer pointed out to me: as for the Villiaumites, it is a common misconception that the "monoblock cleavages" from Kola show true crystal faces. They DO NOT. They are in essence parts of single crystals, but come from large "nests" of Villiaumite frozen in the pegmatite without open cavities. The Villiaumite was formed very late in the development of the pegmatite often followed by Nahcolite and other alkaline carbonates. There are no good crystal faces on the boundaries between the Villiaumite and the later formed minerals. These facts do not reduce the aesthetics of the Villiaumite specimens. Ex. Martin Zinn Collection.
Deutsch: Villiaumit
Fundort: Chibinen, Kola, Murmanskaja Oblast', Northern Region, Russland (Fundort bei mindat.org)
Größe: 6.6 x 5.8 x 4.5 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/mrz289b.jpg, Description: http://www.mindat.org/photo-270107.html
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 Edit this at Wikidata
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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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current21:29, 26 May 2010Thumbnail for version as of 21:29, 26 May 2010800 × 734 (96 KB)RKBot (talk | contribs)== {{int:filedesc}} == {{Information |Description= {{en|1=Villiaumite :: Locality: Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russ

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