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File:Opal-53714.jpg

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Opal-53714.jpg (600 × 392 pixels, file size: 74 KB, MIME type: image/jpeg)

Summary

Description
English: Opal (Var.: Precious Opal)
Locality: Queensland, Australia (Locality at mindat.org)
A rich seam of wonderfully irridescent opal, flashing gold and blue fire, encased in matrix! This is a very large and striking opal specimen. The layer of precious opal is a good 0.5 cm thick, and under it is a thick layer of common opal. Its from the central Queensland opalfield, perhaps the Quilpie or Yowah area. How do we know? Thanks to a friend over there who provided the following details: The matrix is an brown iron-stone or jasper-like rock, which is characteristic of the Queensland stuff. Coober Pedy opal is always hosted in white to greyish clay rich sandstone (usually quite fragile), kaolin or very rarely pale white/grey cherts. You just do not get those brown jasperoid nodules in Coober Pedy. In the Yowah area of Queenland that they are called Yowah Nuts and they are more like a septarian nodule with the cracks filled with precious opal. Also the opal has a characteristic blue background which you do not really get at Coober Pedy. 11.0 x 7.2 x 4.8cm
Deutsch: Opal (Var.: Precious Opal(?))
Fundort: Queensland, Australien (Fundort bei mindat.org)
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-53714.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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current22:17, 25 April 2010Thumbnail for version as of 22:17, 25 April 2010600 × 392 (74 KB)RKBot== {{int:filedesc}} == {{Information |Description= {{en|1=Opal (Var.: Precious Opal) :: Locality: Queensland, Australia ([http://www.mindat.org/loc-127.html Locality at mindat.org]) :: A rich seam of wonderfully ir

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