Collection: Excellent Cut Lab Grown Diamonds

Loose lab grown diamonds with an Excellent cut grade, IGI certified. Cut decides how much light a diamond returns, so it has the biggest effect on sparkle of all the 4Cs.

Why cut grade matters most

Two diamonds with the same carat, color and clarity can look very different because of cut. An Excellent cut diamond has proportions and symmetry that send light back through the top of the stone as brilliance and fire, which also helps hide small inclusions and slight color.

Shop excellent cut by shape and size

Browse round, oval, emerald and radiant lab grown diamonds, compare sizes such as 1.5 carat and 3.5 carat, or shop all IGI certified lab diamonds. New to grading? Start with the 4Cs of diamonds.

Frequently Asked Questions

What does an Excellent cut grade mean?

It means the diamond's proportions, symmetry and polish were graded Excellent, so it returns light strongly as brilliance and fire.

Is cut more important than color or clarity?

Cut has the biggest effect on how much a diamond sparkles. A well cut diamond can also mask small inclusions and a slight tint, so it is worth prioritizing.

Are lab grown diamonds real diamonds?

Yes. Lab grown diamonds have the same chemical, physical and optical properties as mined diamonds; only their origin is different. Each loose diamond on Grown Leo comes with an IGI grading report.