File:Olmiite-Calcite-227589.jpg

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Olmiite-Calcite-227589.jpg(725 × 555 pixels, file size: 115 KB, MIME type: image/jpeg)

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Description
English: Olmiite, Calcite
Locality: N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa (Locality at mindat.org)
Size: 16.3 x 12.8 x 6.1 cm.
A superb, two-tiered, large cabinet specimen is aesthetically sprinkled with ball-like clusters of lustrous, tan, sharply crystallized, orthorhombic olmiite crystals and rare, single prism crystals of olmiite. The large cluster is 2.0 cm and the longest single crystal is 1.2 cm. A superb accent is the 1.1 cm, flattened calcite twin. The layered hematite matrix gives the complimentary, ultra-sparkly, water-clear calcite crystal coating a distinct lavender tint. Many of the calcite crystals are doubly terminated. Olmiite is the manganese-dominant variant of poldervaartite and is found only at the N’Chwaning II Mine, its type locality now. Olmiite was not named until 2007.
Deutsch: Olmiit, Calcit
Fundort: N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Nordkap , Südafrika (Fundort bei mindat.org)
Größe: 16.3 x 12.8 x 6.1 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-227589.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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current01:46, 27 April 2010Thumbnail for version as of 01:46, 27 April 2010725 × 555 (115 KB)RKBot (talk | contribs)== {{int:filedesc}} == {{Information |Description= {{en|1=Olmiite, Calcite :: Locality: N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, [[:en:Northern Cape|No

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