Excellent: Our most brilliant cut, representing roughly the top 1% of GIA diamond quality based on cut. The highest grades of polish and symmetry allow it to reflect even more light than the standard ideal cut.

Ideal cut: Represents roughly the top 3% of AGS diamond quality based on cut. Reflects nearly all light that enters the diamond. An exquisite and rare cut.

Very good cut: Represents roughly the top 15% of diamond quality based on cut. Reflects nearly as much light as the ideal cut, but for a lower price.

Good cut: Represents roughly the top 25% of diamond quality based on cut. Reflects most light that enters. Much less expensive than a very good cut.

Fair cut: Represents roughly the top 35% of diamond quality based on cut. Still a quality diamond, but a fair cut will not be as brilliant as a good cut.

Poor cut: Diamonds that are generally so deep and narrow or shallow and wide that they lose most of the light out the sides and bottom. Godstone Diamond Fine Jewelry does not carry diamonds with cut grades of poor.

Clarity is a measure of the number and size of the tiny imperfections that occur in almost all diamonds. Many of these imperfections are microscopic, and do not affect a diamond's beauty in any discernible way. Much is made of a diamond's clarity, but of the Four Cs, it is the easiest to understand, and, according to many experts, generally has the least impact on a diamond's appearance. Clarity simply refers to the tiny, natural imperfections that occur in all but the finest diamonds.