At this time an overall cut grade for non standard round brilliant diamonds or fancy shaped diamonds such as rectangular oval or square is not available on gia grading reports.
Excellent cut diamond proportions gia.
Diamond cut grade is based on a number of factors including symmetry polish brilliance and fire.
However if the proportions of a diamond are.
Full color 8 page booklet.
Non standard round brilliant cut diamonds.
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.
It also discusses how to use facetware online to obtain a more accurate estimate of a cut grade.
For the most brilliance and beauty only consider round brilliant diamonds with an excellent cut.
Gia uses a 5 grade hierarchy for cut.
Excellent very good good fair and poor.
Gia s approach to diamond cut grade is a proportion based quality system and relies upon a 2 dimensional system to determine a diamond s cut grade.
You might have heard about the fact that the exact diamond proportions determine the cut of a diamond.
And a simplified proportion.
This is exactly what you are looking for in a beautiful diamond.
A description of its shape and cutting style.
Most people are satisfied and feel safe in purchasing a diamond w gia excellent cut grade.
It will therefore exhibit a lot of sparkle brilliance and scintillation.
Gia diamond cutting grades for round diamonds range from excellent to poor.
But reports do contain an assessment of the diamond s polish and symmetry.