Scheelite

Scheelite under SW-UV light
Origin: Korea
Owner: Richard Loyens
 
Very often scheelite it is intergrown with the calcium molybdate, powellite, which lowers its value as a tungsten ore. Powellite has a yellow fluorescence as opposed to the blue fluorescence of scheelite. Miners may determine the powellite-content of scheelite by comparing the fluorescence color of the ore with a standard color card. This allows them to estimate the value of the ore merely by looking at its fluorescence color.
The fluorescence is due to a mechanism called charge coupling.
 

Photo courtesy of: 

Axel Emmermann

Homepage

 

 
Origin: Ortiz mine, near Cerillos, Santa Fe Co., New Mexico, U.S.A.
Owner: Lou Perloff
Microscopic image
 
Origin: Cinovec (Zinnwald), Erzgebirge, Czech Republic
Owner: Lou Perloff
Microscopic image
 
Origin: Langban, Varmland, Sweden
Owner: Lou Perloff
Microscopic image
 

Photo courtesy of: 

Lou Perloff

Photo-Atlas of Minerals

 

Origin: A4 highway tunnel, Thiemendorf, Königshain, Oberlausitz, Saxony, Germany
Picture size: 5 mm
Owner: Thomas Witzke

Photo courtesy of: 

Thomas Witzke

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

  
 
Origin: Mt. Xuebaoding, Ping Wu, Sichuan Province, China
Sample size: 4 x 4 x 2 cm (top), 4 x 4 x 3 cm (bottom)
 
Origin: Hualapai Mtns., Mohave County, Arizona
Sample size: 2.25 x 1.5 x 1 cm
 
  
Origin: Traversella, Italy
ex. Jean Behier , Eric Asselborn Collections
Sample size: 4 x 2.5 x 2 cm
 
Origin: Greenhorn Mtns., Kern County, California, U.S.A.
Sample size: 2.2 x 1.5 x 1.5 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
  
Scheelite with muscovite
  
Scheelite with beryl on muscovite
Origin: Mt Xuebaoding (Mt Xuebaodiang), Huya, Pingwu district, Mianyang (Mianxian), Chengdu area, Sichuan, Southwest Region, China
Sample size: 5.3 x 4.2 x 2.8 cm (top), 10.3 x 7.2 x 4 cm (bottom)
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

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