Natural yellow diamonds are relatively common among fancy colored diamonds, though significantly more rare than white diamonds. It is a common false impression that ayellow diamond is less valuable than a colorless diamonds. Nevertheless, Intense and vivid fancy yellow diamonds happen to be really quite valuable although very light or slightly yellow stones are fairly common and are worth much less.
The pure yellow stones are worth much more than yellow diamonds with secondary brown hues, however, if the diamond happens to have secondary colors of green-yellow or orange yellow, this might raise the price of the stone quite substantially. The reason behind this is that these diamonds harder to come by than yellow diamonds.
Natural yellow diamonds are graded by their strength and intensity of color. The highest-quality grade is the Vivid Yellow, followed by the Intense Yellow diamond. The lowest quality of natural yellow diamond is the Light Yellow diamond, closely followed by the Fancy Yellow. A number of shades of Vivid Yellow diamonds plus the more rare Intense Yellow diamonds are called Canary Diamonds. Canary yellow diamonds are the most rare among yellow diamonds and as a result they cost much more and are desirable both by investors and classy buyers. The canary diamond has a very special shade of yellow, even if you have never seen a Canary Yellow before, if you were to see one, you will realize that it is a Canary Diamond.
Yellow diamonds are normally set in yellow gold. When it comes to the diamond setting, yellow diamonds look superb if they are mixed with white stones, as the white diamonds create a strong color contrast. If you choose a yellow diamond to be a center stone for a 3 stone ring, then it is recommended to have white side stones where trapeze, triangle or oval shapes can be a perfect match.
Like in other natural fancy color diamonds the color remains the main criterion that has a bearing on how much the diamond is worth, after this comes the size and the clarity of the stone. Clarity is also crucial in the evaluation of fancy yellow stones, though much less than in traditional white diamonds.
The ideal cut for fancy colored diamonds is the Radiant cut. This is the ideal shape in order to take full advantage of the color. Yellow diamonds, however, can also be found in Oval Cut an Cushion cut and in Heart and Pear shapes. The rarest are the Emerald, Square Emerald and the Brilliant cuts (round shape). The price of these shapes are substantially higher for all fancy diamonds and not merely for yellow diamonds.
The cut quality of a colored diamond is very different to the traditional diamond. The goal when cutting a fancy color diamond is to intensify the depth and saturation of color while, at the same time, managing to strike a balance between carat weight and brilliance. It is vital that the diamond is purchased with a grading report from a trustworthy laboratory for example GIA, HRD, IGI or EGL. This report needs to state that the color is "Natural". The report must also state the intensity of color, plus the color distribution throughout the diamond.
The Kimberley Octahedron is the biggest naturally formed actohedral diamond in the world. It's owner, who is the mine owner prefers not to cut this diamond and wishes to keep it in its original statetherefore the color and distribution grades are not able to be given to this impressive diamond.