File:Quartz-224145.jpg

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Description
English: Quartz
Locality: Viaplana, Sils im Domleschg, Thusis, Domleschg, Hinterrhein Valley, Grischun (Grisons; Graubünden), Switzerland (Locality at mindat.org)
Size: 16 x 10 x 6 cm.
A most unusual, very colorful quartz specimen, which has not only display aesthetics but also locality value and provenance. It is a very large example of this rare style of quartz from Switzerland, considered a highly desirable part of any Alpine collection because of their striking color and are so unlike other Swiss quartz styles with which we are more familiar. The crystal is complete all around, a floater, with no points of attachment that is fully terminated on both ends. The color is unearthly, as if you took the iron and embedded it in layers to yield a rainbow of refracted colors - indeed, you see rainbows shimmering just under the surface on the main faces of the front. This is not citrine (where iron is part of the crystal structure unit cell), rather it is quartz with iron stain incorporated into the matrix but not part of the crystal structure. This specimen was purchased by Peter Bancroft in the 1950s or 1960s, he recalls. He sold it to a local quartz collector in San Diego area in the 1970s (Alice Walters), and there it remained until she sold her collection about 4 years ago. It then went into the most prominent collection of classic, cabinet-sized Swiss minerals in the US that I know of: that of Karl Kempf in Arizona (a longtime mineral collector specializing in this region). This collection was sold off by Wayne Thompson last fall. Original label in Bancroft's hand is included.
Deutsch: Quarz
Fundort: Viaplana, Sils im Domleschg, Thusis, Domleschg, Hinterrhein Valley, Kanton Graubünden, Schweiz (Fundort bei mindat.org)
Größe: 16 x 10 x 6 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-224145.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
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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current01:16, 27 April 2010Thumbnail for version as of 01:16, 27 April 2010516 × 800 (94 KB)RKBot (talk | contribs)== {{int:filedesc}} == {{Information |Description= {{en|1=Quartz :: Locality: Viaplana, Sils im Domleschg, Thusis, Domleschg, Hinterrhein Valley, [[:en:Graubünden|Grischun (Grisons; Graubün

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