Whether you want to purchase an uncut diamond so that a professional and experienced jeweler can turn it into the perfect gem for a ring or a necklace of your very own design or whether you want to invest part of your money into such precious stones, you should learn something about diamonds before buying one.

The value of a rough diamond is judged according to its clarity, its color and, most importantly to its carat weight. In the case of cut diamonds, the way in which the stone has been cut and polished is also of great importance because the cut can have significant effects on the diamond’s color and clarity and, over all, on its value. Now, even if you do not want to invest in an uncut diamond to obtain profit from it later on, but you want such a precious stone for jewelries or simply because you like them, without being particularly interested in their, let’s say, intrinsic value, you still have to be familiar with the terminology and the grading system used to indicate the clarity and color of these stones. Otherwise, you will simply not be able to understand the description of such products.

A rough diamond can have internal cavities, knots, crystals or minerals or, in the case of lab-created diamonds, laser lines. Such internal imperfections or inclusions are, on the one hand, particularities of each stone, they form its identity. On the other hand, though, they affect the uncut diamond’s clarity and its value. So is the case with blemishes or external imperfections as well. Scratches, chips, breaks, and – in the case of lab-created stones – polish lines are taken into account when the value of a diamond is calculated. Depending on such imperfections, a stone can be graded as FL, IF, VVS1 and 2, VS1 and 2, SI1 and 2, and I1, 2 and 3. These grades mean: flawless; internally flawless; very, very slightly included; very slighted included; slightly included; included. While a FL diamond has neither inclusions, nor blemishes, an IF diamond only has blemishes and the rest of them have inclusions as well. The VVS, VS, SI and I grades are given according to the size and the number of inclusions, which can be seen only with or even without magnification.

As for the color of a rough diamond, you might believe that you could tell it by yourself and that you know what red, pink or blue mean. However, the color of an uncut diamond is actually indicated with letter from D to Z. And no, D doesn’t stand for dark red or daffodil yellow, nor does G stand for green or M for mustard. The letters indicate the stone’s hue as such: D, E, F mean colorless (most valuable and rare), G-J designates the range of nearly colorless diamonds, the letters from N to R are used for very light gems and those from S to Z describe light yellow and brown stones. Usually, the color is indicated by a combination of two letters. At the same time, this grading system is used to describe white diamonds, different determinations being used in the case of the so-called fancy colors, such as pink, red or blue. So, as you can see, in order to be able to browse through a variety of diamonds offered and described by a professional provider, you first have to do your homework.

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