The 4 criteria of diamonds
Cut, color, clarity and carat
Gemmologists confirm that the diamond cut is the most important characteristic since it determines its shine. In the same color, a diamond with good proportions will be much more brilliant than an incorrectly cut pure diamond. Therefore, if a diamond has a beautiful color and good purity, but is badly cut, it will lose a lot in appearance. By cut, we mean the finish, the dimensions, the return of the light to the eye as well as the polishing and the symmetry. It goes without saying that these notions of cut represent an essential factor in the beauty and quality of the diamond, which only a experienced craftsman can master.
Diamonds are also classified by color. Since the most sought -after color is transparent white, or the absence of color, the less the diamond will be colored, higher will be its value. According to the diamond colored classification scale published by the GIA (Gemological Institute of America), diamonds are classified from colorful color (from white to yellow to brown) using the different letters of the alphabet. The scale begins to the letter D which represents the colorless and continues to the letter Z according to the growing presence of color. Thus, the perfect note for a diamond is not an A, but a D! Part of a separate class, "fantasy" diamonds can have very high value given their rarity and color intensity.
Because they form deeply in the earth, most diamonds contain internal foreign bodies, called inclusions, and external defects. In the vast majority of cases, the inclusions are caused by small black carbon crystals that can be trapped when forming diamonds. Diamonds with very few foreign bodies are rarer and, of course, will see their value increased. Using the International Diamond ™ classification system, created by GIA, we classify diamonds by category of clarity. In the determination of purity, we must consider the position, quantity, size, color and nature of the impurities visible under enlargement 10 times.
The weight of diamonds is one of the determining elements of its price. The measurement unit used to determine the weight of a diamond is the carat. This is divided into 100 points; Thus, a 25-point diamond is equivalent to a quarter of a carat, and a 50 points is equivalent to half a carate. Large stones being rare, the price of a diamond evolves exponentially depending on its weight.