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Summary

Description
English: Eudialyte, Aegirine
Locality: Kangerdluarssuq (Kangerdluarssuk; Kangerdluarsuk) Firth, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland (Locality at mindat.org)
Size: 6.1 x 5.3 x 4.3 cm.
A rich and showy specimen of sharp and lustrous, chocolate-colored eudialyte crystals to 1.4 cm associated with black aegirine as a nice accent, from very close to the Type Locality in Greenland. There is contacting, but this is a highly representative specimen of the two species and locality. Originally labeled as zircon altering to eudialyte, this is unlikely. I've been told that there are "numerous references in papers of mineralogy, petrology and geochemistry of Zircon replacing Eudialyte, but not the other way around. There is known one report of Eudialyte formed hydrothermally with indications of Zr being mobilized from preformed Zircon (in the Pilanesberg complex of South Africa eudialyte is interpreted to be hydrothermal formed from an orthomagmatic Na-Nb-REE-Cl-F-solution that exsolved from an agpaitic syenitic magma. In this system the Zr was probably remobilized from an originally formed magmatic zircon. But under such conditions any direct replacement in the form of pseudomorphs would be very unlikely from the petrological description.) This is not the case here. Ex. George Ellng Collection.
Deutsch: Eudialyt, Aegirin
Fundort: Kangerdluarssuq (Kangerdluarssuk; Kangerdluarsuk) Firth, Ilimaussaq complex, Narsaq, Kitaa Province, Grönland (Fundort bei mindat.org)
Größe: 6.1 x 5.3 x 4.3 cm.
Date before March 2010
date QS:P,+2010-03-00T00:00:00Z/7,P1326,+2010-03-00T00:00:00Z/10
Source http://www.mindat.org/photo-138029.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
Authority file
creator QS:P170,Q56247090

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Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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current09:42, 26 April 2010Thumbnail for version as of 09:42, 26 April 2010467 × 500 (88 KB)RKBot== {{int:filedesc}} == {{Information |Description= {{en|1=Eudialyte, Aegirine :: Locality: Kangerdluarssuq (Kangerdluarssuk; Kangerdluarsuk) Firth, Ilimaussaq complex, [[:en:N

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