It is a unit used to measure a diamond’s weight. There are two things to be kept in mind while viewing the carat weight of a diamond:
– The distance in mm from across the top of the diamond.
– The diamond’s cut grade.
The weight of the diamond is independent of its size. It is possible that a diamond is cut too flat due to which it might have a big diameter and appear larger.
Similarly, if a diamond is cut in a pointed fashion, it’ll appear to be smaller in size and depth. Cuts make it possible to distinguish between such diamonds. It is also possible to stumble upon a diamond that has low carat weight but a high cut grade.
Small sized diamonds’ weight is often counted in points. A one-carat diamond is comprised of 100 points, so a diamond of 75 points weighs 0.75 carats, and so on and so forth.
References: You can get a carat weight chart in .pdf format here.
Which Carat Weight to Choose From?
The most important thing you have to keep in mind is the kind of carat weight of diamond you are aiming for. Then comes the size of the finger for which the ring has to be bough, and finally, your budget. If you want a decent carat weight but have budgetary constraints, then you can opt for a diamond with SI1-SI2 clarity and an I or J color grade.
Larger diamonds are inadvertently more expensive as they are not easy to find, and also they are in high demand. Also, a one carat diamond solitaire ring will almost always be of a higher price than a ring that is composed of many smaller diamonds of similar carat weight.
Also, you have to understand that a diamond will appear larger on small fingers and while the same diamond will appear to be smaller on larger fingers.