Links
Laboratories
On a global scale, there are numerous laboratories specialized in diamond grading.  The diamond certificates are issued by these laboratories.

 

 
H.R.D

www.hrd.be

HRD - Antwerp
 
 
G.I.A

www.gia.edu

GIA
 
 

I.G.I

www.igiworldwide.com

I.G.I
Barsamian
 
 
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