Carats are the units of weight for diamonds. Even though weight is not the same thing as size, many people use carats in order to describe the size of a diamond. As there is a correlation between the carat weight and the size, anyway, this isn’t such a big error. One carat is equal to 0.2 grams. As you can imagine, many stones are described in fractions of carat, as they aren’t as heavy as 0.2g.
The price of a diamond increases exponentially with its carat weight. Therefore we consider it to be of utmost importance to have the basic knowledge in place. However, this doesn’t mean the size increase follows the same ratio. As a matter of fact, when the carat weight of a stone triples, let’s say from 1 to 3, the increase in diameter is only 45%, and the crown area roughly doubles. An increase in diameter is always going to determine a larger increase in the crown area, which means the diamond is going to appear larger. You can play with these ratios and proportions, in order to obtain the maximum carat weight for your budget.
Other determining factors
Although the carat weight is important, it is not the only factor that determines the price of a stone. Two diamonds of the same carat weight may have very different prices, as they may have different clarity, cut and color grades. All these influence the value of a stone, so they can only be analyzed together, as a mix. The cut proportions may also influence the apparent size of a diamond. A deeper cut is going to yield a smaller diameter, thus making the stone appear smaller than one with has the proper cut. This is how the cut reflects in other characteristics, and this is also the reason why you can’t compromise on the cut grade, if you want to make a good investment. While color and clarity are more permissive, there’s not a lot of room when it comes to the cut grade and to the carat weight. As a matter of fact, longer shapes appear larger to the eye than round once, so if you really want a diamond larger than your budget, you may consider getting an oval, marquise, emerald or pear shaped one.
There are geometrical explanations of this effect. For instance, an oval stone appears larger than a princess cut one, while also having a larger surface area. The eyes of the viewers get to see more of the stone, there fore perceive it as being bigger than the round one. You can safely go for any shape. They are all beautiful, provided that you don’t compromise too much on the other parameters that influence the price. Nonetheless, if your intention is to mount the diamond in an engagement ring, you may want to make sure your sweetheart loves the shape you intend to choose. After all, she’s going to be the one to wear the ring, so she has to like it. If you want to purchase diamonds as an investment, such considerations are minor and you shouldn’t give them too much attention. Investments have the sole purpose of providing you the best value for your money. Moreover, they have to be easy to sell, should you ever need some urgent cash. This is why you may be better off with the classic brilliant cut, as this is what most people imagine when they think about diamonds.
The Correlation between Carat and the Size
If you want to gain a better understanding of the correlation between the carat weight and the size, you should try to find some charts that illustrate the variation of the size with the number of carats. There are many diamond retailers who seek to educate their potential clients by helping them understand the correct way of assessing diamonds. It’s in their best interest that their clients make excellent choices, so you can safely trust the information they offer. By examining these charts, you can understand why a certain carat weight shouldn’t be your ultimate goal when shopping around for diamonds. Only in the conditions of a good cut grade can one compare various stones, in order to pick the one that provides the greatest value for money. If you want, you can think of diamonds in terms of price per carat weight.
By comparing gems with similar carat weights, you may notice how different their price per carat is. The conclusion is that all other factors that influence the quality of a diamond have to be taken into consideration when making a purchase. This is the only way you can choose the right stone and pay the right price for it. As this industry is well-known for overpriced products, it wouldn’t be a bad idea to take a gemologist with you when you go shopping. Diamonds are forever, so don’t choose yours in a matter of minutes.