Orthoclase

Carlsbad twinning in orthoclase

Origin: Marina di Campo, Elba

Picture height: 18 x 27 mm

Sample owner: H. van Dennebroek

 

Photo courtesy of: 

Carlsbad twin

Sample size: about 3 cm wide

Sample size: about 3 cm thick crystal

Baveno twins

Sample size: about 5 cm

Origin: Goodsprings, Clark Co., Nevada, U.S.A.

Owner: Milton Speckels

Sample size: image about 10 cm

 

Photo courtesy of: 

Photo-Atlas of Minerals

Origin: Königshain, Oberlausitz, Saxony, Germany

Sample size: 7 cm

Owner: Thomas Witzke

 

Photo courtesy of: 

Orthoclase, (variety adularia) on pyroxene and epidote

Origin: Broadford Gabbro, Broadford, Isle of Skye, Inverness-shire, North West Highlands, Scotland, UK

Owner: Steve Rust

 

Photo courtesy of: 

Steve Rust

 

Origin: Hunza valley, Northern Pakistan

Sample size: 5 x 5.5 cm

 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

  

Adularia

Origin: Furka region, , Canton Uri, Switzerland

Sample size: 4 x 4 x 3 cm

 

Adularia, variety valencianite

Origin: Ag mine, Valencia, Mexico
Erling Collection

Sample size: white crystals to 1 cm

 

  

Origin: St. Gothard, Switzerland

Sample size: 14 x 3.5 x 3.5 cm

 

  

Carlsbad twin

Origin: Leadville, Lake Co., Colorado, United States

Sample size: 6 x 3 x 3 cm

 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

  

 

  

Intergrown manebach twins of adularia

Origin: Giuv Glacier, Val Giuv, Switzerland

Sample size: 3.5 x 3.5 x 2.4 cm (top), 3.5 x 3.2 x 2 cm (bottom)

 

Photo courtesy of: 

John Veevaert, Trinity Mineral Co

Trinityminerals.com

 

  

Translucent to transparent colourless blocky crystals of adularia to 6 mm in size.

Origin: Furka basis tunnel (east section), Realp, Witenwasseren (Wyttenwasser valley), Furka, Uri, Switzerland

Sample size: 3 x 2.2 x 1.1 cm

 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

  

Adularia with quartz

Origin: St Gotthard massif, Ticino (Tessin), Switzerland

Sample size: 7.0 x 6.3 x 5.0 cm

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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