A diamond certificate is issued following an unbiased and professional examination to authenticate a diamond's attributes. The carat weight, colour and clarity are all validated, together with the diamond's exact measurements. Cut grades are also included for Round Brilliant cuts. Certificates are essential in determining or testifying a diamond's value. Diamonds sold through Seventy Seven Diamonds have been graded by GIA, AGS, HRD, IGI, EGL (Internationl or USA). It is generally accepted by diamond industry professionals that the Gemological Institute of America (GIA) sets the standard when it comes to diamond grading. At least three-quarters of the 200,000 diamonds listed on Seventy Seven Diamonds have been graded by the GIA.
BEWARE: Always buy a certificated diamond - Unless you are purchasing jewellery set with smaller diamonds, with a centre stone 0.30ct or above, to be certain of the quality insist on a certificate - If your diamond is not graded by one of the 5 internationally recognised certificates listed above, chances are the grading stated is misleading and that you are purchasing something of lesser quality than indicated. Unfortunately some retail shops and online stores self certify, for the sole purpose of increasing their margin on the product sold.
Laser Inscribed Validation: With the 5 leading diamond certification organisations, recent measure to protect the consumer has resulted in certificated diamonds being laser inscribed, usually on the diamond’s girdle, which gives confidence the diamond purchased is the diamond recieved. The laser inscription can be easily verified with a magnification loop. See below for an example of diamonds inscribed by GIA (figure 1) and EGL (figure 2).