Without a doubt, the cut is what makes a diamond truly sparkle, and actually creates the illusion of a larger gem. In fact, great craftsmanship determines a diamond’s beauty, brilliance and brightness.
A well-cut diamond reflects light in a way that seems to come from every part of the stone. If it looks dull and lif eless, JannPaul says it could be due to a light leakage from a flaw in the cut. You should ask to use tools such as the Ideal and Angular Spectrum Evaluation Tool (ASET) to check the details of a diamond’s cut before making your purchase. If you’re not sure of what you’re looking for, a good jeweller will help you.