How To Read a Diamond Certificate

Frankly, valuable as they are, diamonds are extremely easy to misrepresent yet not as complex to buy. Vigilance is key when buying a diamond along with asking the right questions. The benefits of buying a certified diamond are that much insecurity is crossed off due to the answers a certificate provides. The Gemological Institute of America (GIA) & The European Gemological Laboratories of America (EGL USA) are two most widely used institutes that certify diamonds. These certificates help identify diamonds, prove the sellers claims of what the diamond is and help you get insurance on your diamond.

Below is a GIA Diamond Grading Report Sample

Lets start from the top left

    1. Date
          • The date is when the diamond was certified.

    1. Report Number
          • Each diamond has a unique ID# attached to it. It is like a Social Security number for the diamond and will remain with it forever.
          • A lot of times the owner of the diamond will get the diamond inscribed with this number so in case of theft and security it is easily identifiable.

    1. Shape and Cutting
          • Shape will tell us if it round, square (princess) etc.
          • Cutting will tell us what type of cut the diamond is. There are many types of cuts to a diamond but Channel Jewelry uses the standard brilliant cut which is the most widely used and known cut in the world.

    1. Measurement
          • It is the measurement of the diamond
              • Not each round diamond is a perfect circle. So the first two numbers are the diameters of the diamond measured from two different point around the diamond.
              • The third number is the mm from the top of the stone to the bottom (Depth).

    1. Grading Results
          • These are the renowned 4 C’s that characterize a diamond. If you would like more information on the 4 C’s please visit our gemology school page

  1. Additional Grading Information
        • Polish
            • Polish is a characteristic that most related with the luster and life of a diamond. The better the polish the better the diamond will look on you.
        • Symmetry
            • Symmetry directly correlates with the cutting of the stone. The cutter decided what the best way to cut the diamond would be. Cutters will use different shapes to cut a diamond and the symmetry of those shapes must unite perfectly to give it a perfect brilliance.
        • Fluorescence
            • Fluorescence is the reaction of trace minerals within the diamond that cause the diamond to glow when exposed to ultraviolet light. Ideally, if you are buying a flawless or near flawless diamond, you would NOT want any fluorescence. But slight or faint fluorescence wouldn’t effect the look of the diamond too much.
        • Inscriptions
            • As described earlier, inscriptions are usually used as a safety precaution. In the event that a diamond is stolen and recovered this inscription will help identify the diamond.
                • Tip: Insurances companies favor diamonds that have laser inscriptions on the diamond.
            • Also, since diamonds are often used as signs of affection, people have inscribed personal messaged in to the diamond.
        • Comments
            • The comments section is to help the owner understand what is included in the diamond. This section is mostly used to describe the inclusions in the diamonds that are usually not visible with the naked eye.