Diamond certificates appear in 1970 leading and caused big changes in the industry and in the profession habits. T he certificate is acquired with the diamond its ID carnet and identifies the diamond and its characteristics as a unique gem.
The certificate usually contents: the carat weight, its purity, its color, proportions and cut. Also if it has any defect or special characteristic of the diamond should be listed in.
Each gemological lab has its own procedures, some of them valuate the diamond’s proportions, some not (like GIA and LFG). The times to get the certification of a diamond can vary from 24h to several weeks depending on the lab. Also the cost can suffer a big variation depending on the diamonds carat weight and on the kind of solicited certificate.
The most prestigious labs all over the world are:
– GIA (Gemological Institute of America)
– HRD (Hoge Raad voor Diamant)
– IGI (International Gemological Institute)
– AGS (American Gem Society)
If you are going to purchase a diamond or a diamond engagement ring it’s very important to ask for the credentials and certificates of the one you have chose before acquire it.