File:Gypsum-Calcite-Sphalerite-209859.jpg

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Gypsum-Calcite-Sphalerite-209859.jpg ‎(400 × 318 pixels, file size: 49 KB, MIME type: image/jpeg)

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Description
English: Gypsum, Calcite, Sphalerite
Locality: Joplin Field, Tri-State District, Jasper County, Missouri, USA (Locality at mindat.org)
Size: 15.3 x 10.8 x 3.4 cm.
An old Tri-State specimen that is quite unusual: on a surface of deep red micro-sphalerites (a few of them larger, with one isolated crystal measuring 1 cm) are several snowy white crystals. These are very sharp crystals of calcite that have been wrapped in a snowy layer of gypsum - and the note from George Feist on the bottom of its base indicates he thought that pseudomorphism was going on. If you look closely, you can see the sharp faces of the calcite crystals where they show in places through the gypsum, so this may be a replacement caught in progress or simply a very thick (and unusual) coating. Ex. George Feist Collection.
Deutsch: Gips, Calcit, Sphalerit
Fundort: Joplin Field, Tri-State District, Jasper County, Missouri, Vereinigte Staaten (Fundort bei mindat.org)
Größe: 15.3 x 10.8 x 3.4 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-209859.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
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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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