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Originally, every diamond cutter or jeweller himself evaluated his diamonds to determine their value.

Certificates

The invention of specialized laboratories in the seventies which use advanced tools allows for a more scientific evaluation of diamonds. 

This is how internationally-reknowned labs like G.I.A. (The Gemological Institute of America) and H.R.D. (Hoge Raad voor Diamant) emerged.

The role of these laboratories is to analyse diamonds and establish a certificate for each one of them to indicate their characteristics: the 4 Cs: diamond weight, diamond colour, diamond purity, diamond size, as well as their dimensions, fluorescence, polish and symmetry. 

A GIA or HRD certificate is provided with each diamond ring that you find on the Edenly site. You canl find examples of these certificates below : 
certificat