'Diamond enhancement techniques' presentation slideshows

A 2 Carat Diamond Ring

The GIA Color rating scale grades diamonds in descending order with the letters D through W. The difference Tiffany & Co Rings between Color grades near the top of the GIA rating scale are very subtle. When a diamond is mounted in a ring and worn in typical lighting conditions, it is difficult for even an expert to tell the difference between an F (Colorless) and an H (Near-Colorless) grade. A J Color diamond will show a faint yellow cast, and any grade K or below will have an obvious yellow-grey appearance.

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