Pentagonite

  
  
 
  
Pentagonite on stilbite
  
 
  
  
Origin: Wagholi Quarry, Poona, Maharashtra, India
Sample size: 3.5 x 2.8 x 2.4 cm (top/2nd/3rd row), 4.4 x 4.2 x 2.9 cm (4th row), 2.1 x 1.5 x 1.3 cm (5th row), 9.2 x 5.5 x 3.7 cm (6th/bottom row)
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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