Excellent Cut Diamond Proportions

Ideal cut diamond proportions and brilliance.

Excellent cut diamond proportions.

However if the proportions of a diamond are. Appearance is the key cut grade aspect for this case because longer stars combined with the other. An ideal cut diamond reflects almost all the light that enters it and is among the rarest cuts. Cut grade is the most important factor in determining the overall appearance of a diamond because a poorly cut diamond will seem dull even with excellent clarity and color.

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. Proportions are based on the ratios. To find these proportions look at excellent and ideal cut diamonds but remember that not all of them will meet the recommendations. Excellent cut diamonds provide the highest level of fire and brilliance.

The ideal cut diamond is used as benchmark for grading all other diamonds. Ideal diamond proportions depend on the shape as each one interacts with light differently. In the first section we will provide our best summarized insights on ideal proportions for round and non round fancy shape diamonds. This is exactly what you are looking for in a beautiful diamond.

An ideal cut diamond is a round brilliant or princess cut diamond that is cut to ideal proportions and angles and has excellent polish and symmetry ratings. It will therefore exhibit a lot of sparkle brilliance and scintillation. Thus even if you should have a gia triple excellent graded diamond you should still check yourself that it is within the super excellent proportions i personally suggest for round cut diamonds. Because almost all of the incoming light is reflected through the table the diamond radiates with magnificent sparkle.

If you have a stone with perfect diamond proportions the diamond will refract the light in an excellent way. Having an excellent symmetry and polish is a very nice thing to have however the cut proportions of the diamond will impact its beauty even more. This article has two sections. Diamond cut proportions directly affect a diamond s ability to reflect light and provide brilliance.

Compare the results of diamond 1 left with diamond 2 right in figure 1. You might have heard about the fact that the exact diamond proportions determine the cut of a diamond. In the world of round diamonds a stone that scores an excellent rating in all three aspects of polish symmetry and cut 3 ex is often considered to be the pinnacle of well cut diamonds in fact consumers with a better awareness of cut tend to buy diamonds specifically within the triple excellent standards. 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.