Colemanite

 
 
  
 
  
 
  
 
  
  
Colemanite with twins
Origin: Mustafakemalpascha Mine , Western Anatolia Prov., Turkey
Sample size: 13.8 x 11.7 x 6.2 cm (top/2nd row), 11.4 x 7.6 x 5.1 cm (3rd row), 13.3 x 9.6 x 6.6 cm (4th/5th row), 8.6 x 6.8 x 6.5 cm (6th/7th row), 10.3 x 8.2 x 6 cm (8th/bottom row)
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
  
Origin: US Borax Mine, Boron, Kern Co., California, U.S.A.
Sample size: 10.3 x 5.7 x 6.6 cm
 
  
Colemanite with orange calcite
Origin: Boron, California, U.S.A.
Sample size: 9.5 x 7.4 x 5.2 cm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

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