Orthoclase

  
Adularia included with chlorite
Origin: Fellital, Switzerland
Sample size: 5.8 x 3.5 x 3 cm
 
  
Baveno twin with chlorite
Origin: Montecatini Quarry, Baveno, Piedmont, Italy
Sample size: 9.3 x 2.5 x 1.7 cm
 
  
Origin: Aletschgletscher, Hoele Bettmerhorn, Wallis Switzerland
Sample size: 7.8 x 7.3 x 6.5 cm
 
  
Origin: Fieschertal, Valais, Switzerland
Sample size: 13.4 x 10.3 x 4.2 cm
 
  
"Faden" adularia
Origin: Hashupa, Shigar Valley, north of Skardu, Baltistan, Pakistan
Sample size: 5.6 x 2.3 x 1.1 cm (left), 3.5 x 1.9 x 0.8 cm (right)
 
  
  
Transparent, colourless quartz needles and translucent, frosted purple fluorite cubes preferentially and beautifully grow from the sides of the lustrous, snow-white valencianite blades. Valencianite is a low-temperature variety of adularia, which is a variety of orthoclase and is unique to the Valenciana Mine.
Origin: Valenciana Mine, Guanajuato, Guanajuato, Mexico
Ex Marty Lewadny Collection
Sample size: 11.0 x 8.5 x 3.8 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
Origin: Organ Mountains, Dona Ana Co., New Mexico, U.S.A.
Sample size: 9 x 6.5 x 5.8 cm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

Single crystal partly overgrown with chlorite
Origin: Saga Quarry, Langesundsfjord, Norway
Sample size: 6 x 7 x 10.5 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

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