The primary factors that determine the price of Diamond stone are 4c, i.e., Cut, Carat, Color, and clarity. We already explained the 4c in this link. Now, we will explain the secondary factors that are involved in the price of Diamond gemstones.
Apart from the 4 C’s, there are a number of other factors that tell us how to determine diamond value. These are not significant factors, though they do have an effect.
CULET
The culet is the bottom point of a diamond. Usually slightly flat or facet, the culet affects the light performance of a diamond. The culet size and angle are two main factors which can have a significant effect on the value of a diamond.
The ideal culet should be positioned in the exact center of the bottom of the diamond and should be of a small size. Angle deviation and increase in size both adversely affect the diamond.
GIRDLE THICKNESS
The thickness of the girdle, or the edge that is formed where the top (crown) and the bottom (pavilion) of the diamond meet, could have a negative effect on the value of a diamond. The unequal thickness of the girdle will undermine the symmetry of the diamond, which is essential for light performance.
LASER INSCRIPTION
There are a lot of controversies attached to the effect of laser inscriptions on the value of a diamond. Laser inscription causes microscopic indentations on the surface of the diamond itself, marring it with imperfections.
Therefore, it should affect the clarity of the diamond and, thus, the overall price value. However, ironically, as most certification companies inscribe the diamonds themselves, they can exclude them from the grading altogether.
Each of the 4 C’s is extremely important. A 1-carat diamond that is internally flawless, perfectly cut, and has a “D” color could be worth over $20,000. On the other hand, a diamond of the same size that is significantly included has a “good” cut and a “J” color could be worth under $3,000.
For more information on Diamonds and their prices,
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