Neptunite

  
  
 
  
  
A lustrous, sharply terminated, 3.0 cm, neptunite crystal anchors one end of the specimen and dominates the piece. Flanking the neptunite on both sides are light indigo-blue benitoite crystals to 1.2 cm. The snow-white natrolite field is beautifully dotted with small benitoites and upright neptunite crystals.
Origin: Dallas Gem Mine, San Benito Co, California, U.S.A.
Sample size: 17.2 x 11.5 x 10.0 cm (top/2nd row), 9.5 x 5.5 x 2.7 cm (3rd/bottom row)
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

     
Neptunite on natrolite and crossite
Origin: Benitoite Gem Mine, San Benito County, California, U.S.A.
Sample size: 4.7 x 2.2 x 1.8 cm
 

Photo courtesy of: 

John Veevaert, Trinity Mineral Co

Trinityminerals.com

 

  
Neptunite on natrolite
  
Ex. Edward Oyler collection
Origin: Dallas Gem Mine (Gem Mine; Benitoite Mine), New Idria District, San Benito Co., California, U.S.A.
Sample size: 3.3 x 2 x 3.5 cm (top), 7.3 x 5.9 x 3.3 cm (bottom)
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

  
Vitreous black prismatic neptunite crystals, 1.5 cm and 0.8 cm long, with terminated ends and a square outline. Associated with tiny brown cubic joaquinite crystals to 1 mm.
Origin: Gem Mine, San Benito Co., California, United States
Ex. DeVito collection
Sample size: 7.5 x 6.5 x 2 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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