What is Diamond Grading?

GIG Diamond Grading Process

Diamond Grading involves evaluating the qualities of an individual diamond and deciding how its qualities reflect its rarity and value.

Diamond value is based on the famous 4Cs: Cut, Clarity, Color, and Carat Weight. The 4Cs are the four main characteristics that influence and illustrate the beauty of the Diamond, not only the value. They assist gemologists, trading operators, and retailers to compare one diamond to another.

Cut refers to a diamond’s shape, faceting style, proportions, and the quality of its finish. A well-cut diamond captures the light around and allows light to reflect it in a breathtaking way.

Clarity is the relative absence of clarity characteristics, divided into inclusions and blemishes.

Color relates to the amount of body color in a diamond. Truly colorless diamonds are extremely rare and valuable. Most diamonds used in jewelry stores are near-colorless, with at least some traces of yellow and brown.

Carat weight is the weight of a diamond expressed in metric carats. A carat is equal to 0.200 g. The value of a diamond is built considering all the 4Cs as one.

The GIG Diamond Report draws out the 4Cs very clearly in both formats: the extended Diamond Report and the compact Diamond Report.

GIG reports also contain the ‘Reference Grading Scale’  to make it easier to understand Clarity, Color, and Cut grading. When it comes to trading it is common to consider one more C, the certificate. A diamond certificate is known as, the Diamond Report and is crucial for trading operations. It guarantees that a diamond: the object of purchase, is off the quality expressed in the report and therefore any kind of negotiation is taking place on the correct economic parameters.

GIG greatly encourages always to request a ‘Diamond Report’ before buying a diamond or any kind of gemstone.