Diamonds are commodities and are traded on an exchange. As a result, diamond prices are not static. A combination of factors go into setting the price of diamonds.
Diamond Pricing Considerations
Four factors play a large role in setting a diamond's price. Known as the four C's, they are cut, color, clarity and carat weight. The cut refers to the quality of the shape of the diamond. Color is a determination of how colorless the stone is. Clarity refers to whether the diamond has any internal or external flaws. The carat weight of the stone is the final determining factor.
The Role of Rarity
Each of the four C's is a measure of rarity. Large stones are rarer than small ones and colorless stones are rarer than brown- or yellow-tinted stones. As a result, the rarer the stone, the higher the price.
Idex, an international diamond exchange, has recently released the Diamond Retail Benchmark. The DRB is an online service that allows consumers to input diamond specifications and receive a current range of pricing that the consumer is likely to find in the marketplace. DRB's results represent the maximum amount the consumer should find and not an exact amount. It should only be used as a general point of reference, not a definitive price point.