Gia Ideal Cut Diamond Proportions

But the more a diamond is within super ideal cut proportions the better the light performance will be.

Gia ideal cut diamond proportions.

Please note that gia does not assign a cut grade to fancy cut stones such as princess cut or cushion cut yet but still these proportions are critically important in analyzing the cut. In this post we ll focus on proportions represented by the diamond diagram that appears on all gia diamond grading reports and gia diamond dossiers. This article has two sections. By learning about proportions you ll also learn the basics of a diamond s anatomy and gain an understanding of one factor that goes into setting a cut grade determined from a combination of measured parameters.

This short video explains the gia cut scale and how gia classifies round brilliant cut diamonds with a cut grade ranging from excellent to poor by factoring in a range of parameters including the diamond s proportions culet size girdle thickness polish and symmetry descriptions. The gia system places more emphasis on the overall appearance of the diamond as opposed to any single set of proportions. What to look for your eye sees those proportions working together for better or worse when you look at a diamond face up. If you badly want a super ideal cut diamond that is also a hearts and arrows diamond i recommend you go and check out brian gavin and whiteflash.

Ideal cut diamond proportions and brilliance. If a diamond is only slightly outside of super ideal cut proportions it will not matter that much.