Oligoclase

  
10 cm large oligoclase crystal displaying albite twinning on macroscopic scale
Origin: Rogaland, Norway
Sample size: 8 x 10 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

  
Var. moonstone
Origin: Pili Mine, Chihuahua, Mexico
Sample size: 4.5 x 3.4 x 3 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
Variety sunstone
Origin: Tvedestrand, Aust-Agder, Norway
Sample size: 21 x 17 x 13 mm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

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