multicolor  
 
Gemval logo
Reference Values of Gems
Database updated: 15 Jan 2017
  Sign up Log in
 
     
 
 
     
 

Demantoid Garnet


  • Color: green, yellowish green
  • Hardness: 6.5
  • Refractive index: 1.88 - 1.89
  • Density: 3.82 - 3.85
  • Chemical composition: Ca3Fe2(SiO4)3
  • Crystal structure: isometric
  • Origins: Russia, Namibia, South Africa.

Demantoid is a rare and expensive green variety of garnet andradite. The best stones come from the Ural Mountains in Russia. Peculiar 'horse tail' inclusions of byssolite are appreciated by collectors, and will increase the stone's value. Demantoids are generally not treated.


 

 


Market values of Demantoid Garnet  

Occurrence of Demantoid Garnet  

Historical values  


 
 
Gemval logo Color grading system
Color system for opals
Clarity grades
Gems info
How it works
FAQ
Interviews
Testimonials
Updates
Partners
Privacy Policy
Disclaimer
Site Map
About us
Contacts
©2004-2016 Gemval.com
 
  multicolor