Gia Ideal Round Diamond Proportions

Gia diamond cutting grades for round diamonds range from excellent to poor.

Gia ideal round diamond proportions.

Each part of a diamond makes its own contribution to the diamond s appearance. Diamond cut grade is based on a number of factors including symmetry polish brilliance and fire. The diamond i am looking at meets most of your gia ideal cut diamond proportions for buying super ideal rounds but i wanted your opinion on whether i should keep looking or settle on this diamond. 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.

To determine the cut grade of the standard round brilliant diamond the shape that dominates the majority of diamond jewelry gia calculates the proportions of those facets that influence the diamond s face up appearance. Consider a round brilliant diamond with these proportions. Categories of the gia diamond cut grading system for details. The lowest grade for any category establishes the final overall cut grade.

Ideal cut diamond proportions and brilliance. 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. This 1 26 carat round cut diamond is a stunning example of a diamond with ideal cut proportions. If a diamond is cut too shallow or too deep light is lost out the sides and doesn t reflect as well back to the eye.

This graphic illustrates the measured and visually assessed proportions that affect a round brilliant diamond s cut grade. In the standard round brilliant there are 57 or 58 facets. Table 56 crown angle 36 5 pavilion angle 41 2 star length 55 lower half 80 medium. This article has two sections.

The seller is asking for 8175 for a 1 33 round gia vs2 i color triple ex stone no fluorescence. In the first section we will provide our best summarized insights on ideal proportions for round and non round fancy shape diamonds. How gia grades diamond cut quality for round diamonds. The above mentioned diamond proportions are the perfect proportions for round cut diamonds for several reasons.

And of all the diamond 4cs it is the most complex and technically difficult to analyze. For one thing the suggested diamond proportions are even stricter than the proportions demanded by gia or ags for the best cut grade. For the most brilliance and beauty only consider round brilliant diamonds with an excellent cut. A specific set of terms is used to describe parts of a polished diamond.