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Alexandrite

  • Color: color change, from bluish green (daylight) to purple, red or brown (incandescent light)
  • Hardness: 8
  • Refractive index: 1.74 - 1.77
  • Density: 3.68 - 3.80
  • Chemical composition: BeAl2O4
  • Crystal structure: orthorhombic
  • Origins: Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India.

Alexandrite is a color changing varietal of Chrisoberyl. Stones with a strong color change effect are more valuable and represent the most expensive gemstones. Alexandrites are generally not treated.


 

 


Market values of Alexandrite  

Occurrence of Alexandrite  

Historical values  


 
 
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