A diamond certificate is a diamond grading report or document prepared by independent gemmological laboratory. The team of expert gemmologists evaluate, measure, and scrutinize using trained eyes, a jeweller’s loupe, a microscope, and other industry tools. A completed certificate includes an analysis of the diamond’s dimensions, clarity, colour, polish, symmetry, and other characteristics. Many round diamonds will also include a cut grade on the report.
GIA and AGS are the most reputable and widely recognized diamond laboratories. GIA has invented the current diamond grading system and vastly invested in diamond education and research. . Both laboratories are highly respected due to their consistency and their conservative grading standards.
Main Diamond Laboratories:
GIA is the Gemmological Institute of America
AGS or AGSL is the American Gemmological Society
HRD is the Belgium based Institute of Gemmology
IGI is the International Gemmological Institute
Benefit of Certified Diamonds:
Certified diamonds, especially from independent and reputable laboratories like GIA provide authenticate report on diamond quality, whereas non-certified diamonds may have questionable origins or it may not be authentic stone. Certified diamonds have recognizable details and characteristics listed in the diamond certificates. Exact measurements, weight, cut, clarity, fluorescence, colour grade, proportions and finish grade are detailed on the certificate. With the certificate, it can be easier to recover the stone if it is lost or stolen, and if at some point the owner wishes to upgrade the diamond jewellery, it will be easier to find a similar stone with comparable characteristics.
Buying certified diamonds allows you to make informed purchases. Consumers can compare stones of similar quality to judge the best price.
Note:Diamond grading report or certificate is not same as an appraisal. The grading report does not assign value to the stone, it report on diamond quality like precise measurement, internal and external flaws, colour, carat weight and other characteristics. On the other hand, an appraisal report or certificate assigns value to a diamond or jewellery article.