File:Ettringite-Oyelite-Ettringite-Kalahari-Namibia-74mm 0629.jpg

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Description
English: Ettringite, Oyelite
Locality: N'Chwaning I Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa (Locality at mindat.org)
Size: small cabinet, 7.2 x 5.6 x 4 cm
Ettringite
This specimen features a 5 x 2 x 1.7 cm ettringite crystal sticking up from a diagonal shard of matrix. The crystal is a pleasing lemon-yellow color, translucent, completely formed and free of damage. It has an unusual shimmering surface sheen to it, as do most of these. It is very rare to find large ettringites on matrix, particularly with such good display, from past finds (mostly in the 1980s).Like most pieces from this pocket, it exhibits an unusually good tapering of the barrel-shaped termination whereas past finds tended to have a more blocky barrel-shape all the way to the termination. The matrix is a black manganese-rich ore with a thin soft Oyelite (perhaps with Bultfonteinite) deposition on its front side. It is speckled at the lower-left with sparkling micro-hausmannite crystals.
Deutsch: Ettringit, Oyelith
Fundort: N'Chwaning I Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Nordkap , Südafrika (Fundort bei mindat.org)
Größe: 7.2 x 5.6 x 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/new2010/Ettringite-Kalahari-Namibia-74mm_0629.jpg, Description: http://www.irocks.com/render.html?species=Oyelite&page=0
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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Rob Lavinsky, the copyright holder of this work, hereby publishes it under the following license:
w:en:Creative Commons
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Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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