Clarity
Clarity of yellow diamonds is graded the same way as traditional colorless diamonds – the fewer number of inclusions or blemishes, the higher the clarity grade. Where yellow diamonds are concerned, they are well known to often be found in nature with a relatively high clarity grade. This is a very beneficial trait of yellow diamonds.
Generally speaking, fancy colored diamonds also tend to mask imperfections well due to the stone’s more vibrant coloring. So the same considerations apply for a yellow diamond as for a colorless diamond – you want to focus on finding one that is eye clean, meaning the diamond has no inclusions or blemishes that are visible to the naked eye.
In general, fancy-colored yellow diamonds are eye clean. This is a great benefit of this stone, so you are likely to find a significant amount of yellow diamonds with relatively high clarity gradings, making for a nice selection. So, finding yellow diamonds with VS clarity and higher is going to be a fairly easy task. That being said, there isn’t likely to be much difference in clarity between an SI1 and a VVS1 when it comes to being eye clean, so a larger diamond with SI1 clarity next to a smaller diamond with VVS1 clarity, you’ll notice size and not the clarity grade.
Cut
For the cut of a yellow diamond, and all fancy colored diamonds in general, we have another marked difference when compared to colorless, white diamonds. Traditionally, diamonds are cut to maximize fire, brilliance, and scintillation to create that iconic sparkle and dancing array of light emanating from a diamond. In a yellow diamond, these traditional characteristics are considered to be secondary to the color.
All fancy colored diamonds are cut to maximize color intensity which thereby results in maximizing their value. This characteristic changes how you should consider the cut grade for your yellow diamond selection. An excellent cut yellow diamond will come at more of a premium cost, but if the stone’s hue, saturation, and tone aren’t to your preferences, it doesn’t matter how great the cut grade is.
When it comes to the cut, it’s not necessary to aim for excellent cuts only. You should stay away from bad cuts and focus on very good to excellent symmetry and polish. The same as with clarity, an excellent cut is going to be priced at a premium, and you are unlikely to notice substantial differences in the good to very good range if you prioritize symmetry and polish. Also, radiant cuts can intensify the color while brilliant cuts can often reduce the color.
Carat
Yellow diamonds are the second most common fancy colored diamond, but they are still quite rare in larger sizes. It is quite common to find yellow diamonds up to 1.5-2 carats. From there, it can get much more difficult to find them. But we also have to remember that it’s not just the size of the diamond, it’s the range of color intensity that will vary with carat weight.
It’s going to be much easier to find yellow diamonds of mid-level color intensities than it will be to find those with the strongest intensity. And while the same pricing structure exists for fancy colored diamonds, where the cost increases exponentially at each full carat level, the range of costs at every full carat level are heavily influenced by the depth of color.