GIA and HRD certificates of authority of the comparison

GIA Gemological Institute of America is the U.S. and the world's jewelry industry is the largest and most recognized accreditation bodies Diamond Diamond 4C scope of the inventor of the major services and expertise in the jewelry appraisal education and research by global jewelry industry is non-recognition of the Academy profit organization funded by the jewelry industry to donate in honor under the premise of the first man-made factors will not identify the contents of the results so identified quality of the book very credible
HRD is the Belgian Diamond High-Level Council (the Dutch name of the Hoge Raad voor Diamant short), HRD set up in the diamond city - Antwerp. Antwerp's diamond industry about 1500 years. More than 50% of the gem diamond sales from here all over the world. HRD laboratories to international standardization of the Precious Stones Lab (ISO/IEC17025).

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