Gemological Certificates
A certificate is a record of the diamond or gemstone’s pedigree and it is your assurance that you are in fact receiving the diamond you have so carefully chosen. A diamond certificate is a written professional gemological report from an accredited laboratory that explains and describes all of a diamond attributes including: shape, diameter, length, width, weight, depth percentage, table percentage relative to the diameter, girdle characteristics, culet description, polish and symmetry conclusions, clarity, color, and fluorescence. A certificate also contains a front and back diagram of the diamond with a plot of its inclusions. The certificate will also include the date, name and address of the laboratory and a certificate number that is registered in the database of that lab.
In a gemstone report it will have specie of gemstone, cutting style, measurements and weight of gem, description of color and indication of any treatment, some can also have the country of origin if that can be determined and some may have a description of clarity of gemstone.
The certificate is like a record of the diamond or gemstone’s pedigree and it is your assurance that you are in fact receiving the diamond you have so carefully chosen.
A certificate is prepared by a certified professional using the most advanced gemological instruments. There are a number of qualified, recognized laboratories around the world that issue diamond and gemstone certificates, They include the Gemological Institute of America (GIA), the Diamond High Council in Belgium (HRD), the International Gemological Institute (IGI), the European Gemological Laboratory (EGL) and the American Gem Society (AGS) American Gemological Laboratory, Gübelin Gem Laboratory, GRS Gem Research Swiss Lab . Each is a respected and qualified laboratory and therefore, the report on your certificate will be honest and will not inflate or deflate the quality of your diamond or gemstone.
Fancy color diamonds can have gemological reports that will describe the clarity and some that will only address the color. In fancy colored diamonds, the diamond grading report states the concentration of colors as: Fancy Light, Fancy, Fancy Intense, Fancy Vivid and Fancy Deep. Each of these terms will be followed by color or a combination of colors that the diamond possesses, including whether the color is evenly dispersed through the diamond or concentrated in certain parts, such as the center or the edges.