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Kornerupine

  • Color: green, yellow-green, brown, blue-green
  • Hardness: 7
  • Refractive index: 1.66 - 1.69
  • Density: 3.25 - 3.35
  • Chemical composition: (Mg,Fe)4(Al,Fe)6(SiO4,BO4)5(O,OH)2
  • Crystal structure: orthorhombic
  • Origins: Greenland, Tanzania, Madagascar, Kenya, Sri Lanka, Burma, Australia.

Collector's stone. Crystals demonstrate noticeable pleochroism effect, from yellowish-green to reddish-brown, with clean specimens over 5 ct. being rare.

 


Market values of Kornerupine  

Occurrence of Kornerupine  

Historical values  


 
 
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