Blue Diamond Ring Guide

carat: The carat weight has nothing to do with quality of a Blue Diamond Ring, but rather speaks about the weight of the diamond.

Bigger is not always better, so the saying goes, but as far as diamonds are concerned, bigger is most certainly more expensive. There is a large demand for larger size diamonds (heavier) and large diamonds are extremely rare. Therefore the price per carat goes up with its size. For example: Let’s say, that you have a G color SI1 clarity diamond, that weight 0.50ct to 0.69 ct set in your Blue Diamond Ring. It will be listed a a certain price per carat. If you increase the weight of that stone to 0.70ct to 0.89ct, the per carat prize of that stone will go up by about 1,100.- USD per carat. At the next weight increase, which is the 0.90ct to 0.99ct range, you will have to add on another 800.- USD per carat. With a 1.00ct to 1.49ct stone you would need to add another 800.- per carat and with a stone in the range of 1.50ct to 1.99ct ad another 1,200.

I think you get the picture, but if you have any doubts, just drop me a comment and i will try my best to clear it up for you. What is a carat ? Historically the carat was a  locust bean or carob bean seeds, from the Greek Keraton. Today, the carat is defined as 1/5 of a gram. In the industry one carat is often devided into points, one carat = 100 points. So if the jeweler tells you that the diamond in your Blue Diamond Ring weighs 75 points, you will know that this means three quarter of a carat.

Unlike loose diamonds, which you can simply weigh on a scale, it is much harder to estimate the weight of a set stone. There are formulas to do this and a professional will be able to estimate the weight of such a stone within a margin of error of about 1-2 % by measuring the diameter and preferably, the depth. For diamonds of other shapes, it is more difficult to estimate the weight, but specialised diamond gauges such as the Leveridge gauge come with a booklet of conversion tables, and instructions, making it easier to judge the diamond in the Blue Diamond Ring.