It is not common to find diamonds that have exactly the same price because every stone is absolutely unique. The “cut” grade, for example, is divided into three distinct subgroups:
Overall cut grade (that does not count for fancy-shapes, meaning all shapes except round)
Even if the weight, the clarity, and the color are the same, it is unlikely that the cut grades, ranging from “poor” to “excellent”, are equal as well. Therefore, most diamonds have slightly different prices, even if they appear the same at first sight.
We recommend staying above the cut grade “good” for optimal brilliance!
Fluorescence and diamond prices
Furthermore, fluorescence affects price. GIA certificates include information on this type of blue light that the stones display when exposed to ultraviolet radiation. The less fluorescence a diamond exhibits, the better – and expensive. The intensity according to GIA ranges from “very strong” to “none”. We recommend staying below “medium”.
Comparing diamond prices: What to look out for
Below, you can see some example images of diamonds with nearly the same carat weight, but strongly differing prices. When comparing diamond prices, always pay attention to the 4C!