Opal

  
Hyalite opal (fluorescent)
Origin: Spruce Pine District, North Carolina, U.S.A.
Sample size: 17.0 x 11.2 x 2.3 cm
 
  
  
Origin: El Cobano Mine, Jalisco, Mexico
Sample size: 5.2 x 5.1 x 2.9 cm
 
  
White hyalite opal pseudomorph after quartz with spessartine
Origin: Tongbei, Fujian Province, China
Sample size: 4.4 x 2.4 x 2.2 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
 
Origin: Square Top Mountain, Kaimkellenbun, Dalby district, Queensland, Australia
Sample size: fov 27 mm (top left), 8 mm (top right), 8 mm (2nd row), 19 mm (bottom)
Sample owner: Queensland Micromineral Museum, Queensland Mineralogical Society
 

Photo courtesy of: 

Theo Kloprogge

 

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