![]() Only a professional can grade a diamond, following the guidelines of the world’s most authoritative laboratory, the Gemological Institute of America or the GIA. How well a diamond is cut will determine its quality, which is graded and placed into four categories fair, good, very good, and excellent. A poorly cut diamond will not only appear dull, but its value will decrease drastically. The quality of a diamond’s cut determines more than how it sparkles. While a rough diamond does need to be cut to be shaped, the two properties hold entirely different meanings when it comes to deciding a stone’s value. The cut of a diamond relates to the unique facets that allow the stone to reflect light, producing shine and sparkle. A diamond’s shape refers to its geometrical form, such as round or square. ![]() Many people don’t realize that a diamond’s cut and a diamond’s shape are two different characteristics of the stone, both of which are considered when determining a diamond’s cost. ![]() The Difference Between Diamond Cut And Diamond Shape Before you invest in a diamond ring or sell any old jewelry, take a look at how diamond shape affects value. One of these factors is the stone’s shape, which can significantly affect the cost of a piece of jewelry. While most people know the value of a diamond is determined by the four C’s, carat, clarity, color, and cut, few know that other factors can influence the price of a diamond. Try an intelligent search for a fancy shape diamond using your budget and you’re sure to find a diamond that catches your fancy.It’s no secret diamonds are valuable, but estimating their worth can be tricky. So for the same budget, you can afford more carats, which will mean that your fancy diamond will look even larger than the comparisons shown here. In general, fancy shapes cost less per carat than round brilliant shapes of the same quality too. We have one more fancy fact that will surprise you. Interested in another shape or size shape or size, this handy diamond carat size chartwill help you judge the average size. Here are five two-carat diamonds in different shapes. See how the elongated shapes look larger? In particular, the marquise, pear-shape and oval on the bottom row face-up with a larger appearance, don’t you think? Here are six 1.25-carat diamonds in different shapes. Intrigued? Here are some side-by-side images we took of fancy shape diamonds and round brilliants that weigh the same so you can see the way the shape affects the apparent size. (Because when it comes to diamonds, it’s really hard to argue with looking bigger.) If you are considering a fancy shape diamond, the apparent size difference might tip the balance. That’s a big difference in carat weight and budget! These two diamonds might look similar in size but the round brilliant is 3.00 carats and the oval diamond is 2.50 carats. This visual trick makes the elongated silhouette of many fancy shapes look even larger than their surface area might suggest. Why? The effect of the overall shallower depth of the oval cut is exaggerated by the tendency we all have to assume that taller shapes are larger. Most people say that it looks much larger than the other two shapes than you’d expect. In contrast, a two-carat oval is about 10.5x7mm. A two-carat Asscher cut is about 7mm square so it doesn’t look quite as large. A two-carat round brilliant is about 8.1mm across. That means that some fancy shapes look larger than a round brilliant of the same weight and some look smaller. If you have a swimming pool that’s 10 feet deep, it’s going to be smaller across than a pool that has the same amount of water that’s only 8 feet deep. Each shape has a slightly different depth, so the diameter is different too. However, what might surprise you is that fancy shapes have different ideal proportions than rounds. Ideal cut diamonds, which are cut for sparkle rather than size, are slightly smaller in diameter than less-brilliant “spread” diamonds (which are intentionally cut a bit shallower so they can appear wider.) Of course, most one-carat round diamonds will be pretty similar in size, although there will be variations depending on proportions. One of the first things you learn about diamonds is that they are sold by weight rather than size.
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