Diamond Carat

Carat refers to the weight of a diamond, rather than its size. A diamond’s carat weight is closely related to its size (a large diamond usually weighs more), but they are measured in different ways. Diamond size is measured in millimeters (mm) while diamond weight is measured in carat (ct). People are very interested in the carat of a diamond, but it’s not the only thing that matters.



Approximately 250 tons of earth is mined to produce a single one-carat diamond.


Generally, the higher the carat weight, the higher the price. But there is a common misconception that a 2.00-ct diamond will cost exactly twice as much as a 1.00-ct diamond. Unfortunately, this is not the case as the carat weight alone does not determine the price of a diamond. Larger diamonds are a lot rarer than smaller diamonds and of course, like anything, the scarcer something is, the more it costs. So, a 5.00-ct diamond will not cost 5-times the amount of a 1.00-ct diamond as it is the size and rarity of the diamond that accelerates its price and value.

buying guide


The quality of a diamond is determined by the 4Cs (carat, clarity, cut and colour). The most common mistake we see is people focusing on carat alone when buying a diamond. However, when it comes to diamonds, bigger is not always better. A flawless 1.00-ct diamond is often worth considerably more than a 3.00-ct diamond with imperfections. For a smarter purchase, focus on getting a good balance of the 4C’s rather than solely focusing on carat weight.


Big isn’t always the most beautiful. At Alicia J we like to provide our customers with a range of diamond carat weights, according to their budget. Remember carat isn’t the only indicator of quality.


Some diamond shapes tend to be less expensive per carat than others. Various fancy-shaped diamonds can give the illusion of a larger stone and therefore higher carat weight. Therefore, if the size of the diamond is important to you, it is worth considering all available shapes. As experienced diamond experts, we can guide you through the benefits of each diamond shape to help you make an educated, informed and confident decision.


Designing the jewellery your diamond will be placed in is so important. Different personalities prefer different styles. But there are also a few design tricks to make the most of your diamond choice. Placing a diamond in a halo setting gives the illusion of a larger diamond and carat weight, without inflating the cost, for example. We’ll help you make the most of whichever diamond you choose in the design of your ring or other jewellery.

Still confused?

We’re here to help. We’re diamond experts and will guide you through the entire buying process to help you make an educated, informed and confident decision.