It is no secret that diamonds' Cut is one of the most important 4Cs, not only determining how they look, but also for how much they can go for on the retail market. To make sure you choose the right diamond and one you will always love, it is important that you understand the basics of the Cut grade. Below is a list of all the information you need to know about diamond cuts. As a way of keeping it concise and easy to refer back to later, we have separated our summary into two parts, one for Round diamonds, and the other for all Other shapes.
Part 1: ROUND DIAMONDS
A fact most people might not know is that Cut grades are officially given only to round diamonds on certificates. Diamond certifiers, like IGI, award the grades, from the highest, Ideal then Excellent, Very Good, Good, and so on depending on how closely they match the established dimensions for that specific ct size. Due to this, Round Diamonds are the only Cut whose dimensions can be compared against a set of ideal measurements derived from mathematical formulas.