Datolite

  
 
  
Datolite crystal on quartz
  
 
  
Origin: Dalnegorsk, Primorskiy Kray, Russia
Sample size: 6.5 x 5 x 4 cm (top), 7 x 6 x 4 cm (2nd row), 9 x 7 x 3 cm (3rd row), 11.0 x 6.8 x 3.7 cm (bottom)
 
  
Datolite nodule
Origin: Keweenaw County, Michigan, U.S.A.
Sample size: 7.8 x 6.0 x 2.9 cm
 
  
  
The datolite is coloured by the underlying prehnite, and so itself looks like frosted prehnite here.
Origin: Nchwaning Mine, Kalahari Manganese Field, South Africa
Sample size: 4.4 x 3.0 x 2.7 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
  
Origin: Dal'negorsk, Primorskiy Kray, Russia
Ex.Marvin Pearce coll.
Sample size: 4 x 5 x 6 cm
 
  
 
  
Origin: Paterson, New Jersey, U.S.A.
Sample size: 12 x10 x 4.5 cm (top), 8 x 7 x 5.5 cm (bottom)
 
  
Origin: Roncari Quarry, East Granby, Connecticut, U.S.A.
Sample size: 17.6 x 9.8 x 3.3 cm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

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