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.
Excellent cut diamond proportions.
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.
Ideal cut diamond proportions and brilliance.
The ideal cut diamond is used as benchmark for grading all other diamonds.
A change in the star length from 55 to 60 with all other proportions remaining identical changes the estimated cut grade from excellent to very good.
Diamond cut proportions directly affect a diamond s ability to reflect light and provide brilliance.
In the first section we will provide our best summarized insights on ideal proportions for round and non round fancy shape diamonds.
You might have heard about the fact that the exact diamond proportions determine the cut of a diamond.
It will therefore exhibit a lot of sparkle brilliance and scintillation.
Excellent cut diamonds provide the highest level of fire and brilliance.
This article has two sections.
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.
This is exactly what you are looking for in a beautiful diamond.
Proportions are based on the ratios.
Compare the results of diamond 1 left with diamond 2 right in figure 1.
As you look at diamonds be sure you re getting the best diamond proportions for the shape.
To find these proportions look at excellent and ideal cut diamonds but remember that not all of them will meet the recommendations.
If you have a stone with perfect diamond proportions the diamond will refract the light in an excellent way.
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.
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.
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.
Ideal diamond proportions depend on the shape as each one interacts with light differently.
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.
Conversely a well cut diamond can have a slightly lower color g h or clarity si1 si2 and still look quite beautiful due to its superior ability to create sparkle and.
