The price of the diamond is calculated based on three factors: the quality of the gem, market conditions, and the seller’s margin.
The quality of the gem
At this point we refer to those known as 4Cs, (Carat, Color, Clarity, Cut) which translated into Spanish would be the weight, color, purity and size. The better the overall quality of the diamond, the higher its price. To delve into the aspects that determine the quality of diamonds, it is best to refer to the article published in Diamond characteristics where we explain in detail the 4 C’s.
The way to establish the particular conditions of each stone is through a certificate issued by a prestigious gemological laboratory. The best known and world-renowned are the GIA, HRD and IGI certificates.
The second aspect that determines the price of a diamond is market conditions. So when there is a strong global demand for diamonds, there is a shortage and diamonds go up in price, and vice versa.
The price depends on a list called Rapaport, which is updated every week and which establishes a reference price for certain weight, color and purity. On these, the price will then have to be adjusted depending on the size and fluorescence.
The seller’s margin
Once the price of the diamonds has been determined in the wholesale market, it only remains to add the margin that the seller of your choice will charge you. The most well-known international jewelry brands that spend a large budget on advertising, staff and the rental of premises in prestigious streets, will have to sell the same diamond at a higher price than a jeweler with less expenses or an online store. In any case, 21% VAT will have to be added in Spain.