Certificates :
- AGS DIAMOND REPORTS www.agslab.com
- EGL Certificates www.eglinternational.org
- GIA - GEMOLOGICAL INSTITUTE OF AMERICA www.gia.edu
- HRD ANTWERP www.hrdantwerp.be
- IDL - INTERNATIONAL DIAMOND LABORATORIES www.diamondlab.org
- I.G.I. - INTERNATIONAL GEMOLOGICAL INSTITUTE www.igiworldwide.com