A diamond cut that represents the top 25% of diamond quality based on cut. This type of diamond reflects most light that enters and is generally less expensive than a diamond with avery good cut, and is an acceptable choice for jewelry.

Diamonds that are K appear faintly yellow in color. These diamonds are much less expensive and less valuable than diamonds in color grades D through J.

SI stands for Slightly Included.These diamonds contain inclusions that are visible under 10x magnification, but are not very noticeable to the naked eye. SI3 is slightly of a lower grade than SI2, but higher than I1.