Your diamond has super ideal cut proportions which means its brilliance is topnotch. Granted, there are many other proportions to consider as well, but table and depth are the most important factors. Below is a chart that shows all the different facets of an ideal cut diamond. The ideal cut is dependent upon perfect proportions and symmetry: these must be precise. Ideal Proportions An Ideal proportion refers to the specific parameters within a diamond that are meticulously cut to precise angles and exact proportions allowing it to exhibit the maximum balance of brilliance, scintillation and fire. Cut refers not to a diamond's shape (e.g. Ideal cut diamond proportions allow the stone to retain and reflect as much light as possible, which produces the brilliance and sparkle we all love. Ideal cut diamonds are those which have been cut to exacting proportions and polished with utmost attention to detail. According to the Diamond Standards of the American Gem Society, for a diamond to receive a grade of AGS Triple Zero®, it must achieve an AGS Ideal® grade for its cut, color, and clarity. An ideal cut diamond is a round, brilliant, or princess cut diamond that is cut to ideal proportions and angles and has excellent polish and symmetry ratings. The result is a beautiful sparkle. This is basic geometry, but stick with me. It takes hard work, patience, and a shared vision to realize its full potential. First of all, try to remember that not everybody cares about diamond proportions the way we do. Diamond cutters seem to target these proportions because the highest concentration of diamonds is contained within the green box. The proportions, glitter, brightness or brilliance and beauty are realized by ideal proportions, symmetry and cut of Table, Crown hight, Pavillion and Cullet. What the GIA offers will not be a cure-all, but any solid knowledge will be welcomed by those with open minds. The cut quality of a super ideal cut diamond goes above and beyond that of the GIA’s “Excellent” and AGS’s “Ideal” grades. Anything beyond a 1:1.05 would cause the diamond to look “off-square” to the eye. (That’s part of a cone-shaped solid next to the base, formed by cutting off the top with a … but to a diamond's proportions, symmetry and polish. The history of H&A diamonds dates back to the mid-1980s Japan where diamonds were cut to “ideal proportions”, very close to the modern round brilliant cut created by a Russian mathematician and diamond enthusiast Marcel Tolkowsky in 1919. I’m thinking it would be prudent to determine a lower offer price, and would much appreciate your input on price given the used condition, seemingly non ideal proportions, limited images/no video of ring. Ultimately, angles and proportions are what give a super ideal cut diamond the best performance. The lower the depth, the larger the diamond will appear when viewed from above, as more of the weight is located in the crown, or top, of the diamond. The Ideal Cut Round Brilliant Diamond describes a round brilliant diamond that has been cut to exact and mathematically proven proportions. The ideal cut diamond is used as benchmark for grading all other diamonds. This diamond cut is a very good option for rings, especially for people who have long fingers. If a diamond is cut to ideal proportions, it will exhibit the most brilliance and sparkle, however, this means that the yield from the rough will be lower (translation: lower carat weight, less profit for the cutter). Octonus will verify your registration key’s validity and email you a link for secure Credit Card Payment. Ideal cut facets. Proportions: Everything Works Together. Introducing THE LEO Ideal Cut Diamond, a diamond with geometrically ideal proportions. In this post, we’ll focus on proportions – represented by the diamond diagram that appears on all GIA Diamond Grading Reports and GIA Diamond Dossiers. More time is required of the most skilled diamond cutters, and more of the rough material must be sacrificed in order to produce ideal cut diamonds. Here’s a reference diagram that compares the outlines of different l/w ratios. The following table should give you a brief overview of GIA Grading: GIA Grade Description ; Excellent : Optimal level of fire and brilliance because almost all of the incoming light is reflected by the diamond. It is far more costly to cut a diamond to ideal specifications. By learning about proportions, you’ll also learn the basics of a diamond’s anatomy, and gain an understanding of one factor that goes into setting a cut grade, determined from a combination of measured parameters. Ideal Diamond Proportions No need to become an expert. This is a very difficult set of paramters to objectively define, but we are getting there however slowly. The whole is greater than the sum when it comes to a diamond’s proportions, which are the dimensions and angles of a polished diamond’s facets and how they relate to one another. Each part of a diamond makes its own contribution to the diamond’s appearance. A specific set of terms is used to describe parts of a polished diamond. Basic Proportions. Hence "excellent" or "very good" grades are the first hint to ideal diamond proportions. Well–proportioned diamonds exhibit three different properties: brilliance, dispersion and scintillation. Diamond Proportions: Looking at the Numbers. The hearts and arrows pattern is more on diamond symmetry, and the black color of the arrows pattern is under the diamond cut. Upgrade DC2 to DCPro for US$3,259.00 Upgrade DC3 to DCPro for US$3,198.00 Click on “Upgrade Now” to fill the request form. In simple terms, consider a diamond to be composed of three components that fit together: a cone, cylinder, and frustum. In honor of finding your ideal love, the master artisans at Leo Schacter have worked hard to create a diamond worthy enough to celebrate it. Robert has access to suppliers from all over the world including those who are specialists in a particular cut. Note on “Ideal” cuts: Though some diamond search engines may be populated with the term “ideal cut,” GIA does not recognize this term. In that tutorial, I introduced the Tolkowsky Ideal-cut (TIC) set of proportions that Marcel Tolkowsky believed produced the optimum light performance for a round brilliant diamond. An ideal cut diamond may be a round, brilliant, or princess cut. Heck, the majority of the industry probably doesn't even understand the concept of light performance. The princess diamond is traditionally a square cut made of 4 equal sides. Our diamond grading reports cover all 4Cs of diamond certification for loose diamonds, ensuring consumers know exactly what diamond they are buying. As you can see, both laboratories gave the diamond the same carat weight, color, clarity, and overall cut grade of AGS Ideal / GIA Excellent cut. Our recommended depth 71-75% and table 68-72% are outlined by the green box. Also, my research has shown the cost of an ideal 1.34ct F diamond to range from $10-13k, this diamond is listed for approximately $9k. ; The best cut diamonds will sit in the intersection between GIA Excellent and AGS Ideal. This graphic illustrates the measured and visually assessed proportions that affect a round brilliant diamond’s cut grade. In my opinion, the ideal length-to-width ratio should be within the range if 1:1 to 1:1.02. And of all the diamond 4Cs, it is the most complex and technically difficult to analyze. When a stone is cut to ideal cut diamond proportions, light entering from any direction is fully reflected through the top of the diamond and dispersed … If they are close to ideal, then the rest of the diamond should be close as well. At HRD Antwerp, we are experts in analysing these characteristics. Like with a diamond’s table, jewelers grade a diamond’s depth based on its depth percentage. Ideal love is a rare and perfect thing. Tolkowsky Ideal Cut Diamond Proportions If you’re in the market for a beautiful diamond, it’s likely you’ve been doing some researching into the all-important Four C’s. You can find the below proportions on your GIA Diamond Certificate. The beauty of a diamond depends more on cut than any other factor. And that is, without a doubt, the round cut. There is no set “formula” or set of proportions that result in a perfectly cut diamond. As light strikes a diamond's surface, it will either reflect off the table of a polished stone or enter the diamond. However, the ideal depth is between 62.9 and 59.5 percent. Your research has probably led you to the understanding that the cut of a diamond is the most important of all quality grades – and that would be correct. It’s behind the scintillation of the diamond because of the perfect contrast of black and white. To determine the cut grade of the standard round brilliant diamond – the shape that dominates the majority of diamond jewelry – GIA calculates the proportions of those facets that influence the diamond’s face-up appearance. With that in mind, don't expect your local jeweler to be a walking, talking, diamond proportions dictionary. round, oval, pear, etc.) An Ideal diamond is a superb combination of cut, brilliancy, scintillation and dispersion. Enter a round diamond’s table %, crown angle, and pavilion angle to see how it would be scored based on the GIA and AGS proportion based cut grading systems. Before you can determine the ideal proportions for a diamond, you must first determine the ideal cut. This is achieved when a diamond’s facets direct its internal light rays towards the center of the stone and then […] Robert has relationships with trusted diamond dealers ensuring that the client receives only the best quality stones. An ideal cut diamond reflects almost all the light that enters it, and is among the rarest cuts. This means the best cut of a colorless and flawless diamond of any size.” So I wrote AGS inquiring about their ideal cut proportions. Best options under this category are FL-VS2 or even eye-clean SI1 clarity, F-H color, and excellent to very good cut with ideal proportions, and none to medium blue fluorescence. For those of us also looking to get the largest size out of a diamond, depth matters in terms of where the weight of the stone is located. Therefore, diamonds tend to be cut in a way to retain as much weight from the rough, sacrificing beauty for weight. He enjoys working with Premium Ideal cuts, Ideal Cuts, Triple Ideal cuts, and Hearts and Arrows cuts. We plotted the proportions data for all princess diamonds in our database from James Allen and Blue Nile in the figure below. In the standard round brilliant, there are 57 or 58 facets. Scenario 3: Under this scenario, shoppers often don't mind compromising on the other 3Cs in order to get a bigger diamond. The proportions of the diamond are expressed slightly differently, and this is one of the differences between the two gemological laboratories. Marquise cut diamond - Ideal proportions of a high quality marquise diamond Marquise cut diamonds also know as Marquise Diamonds are not as popular as the round cut diamond, but will be a very good option if you are looking for a stone that is elongated. Depth percentage is the diamond’s depth divided by the width of the diamond. It turns out that there is actually a range of proportions that can be considered to have the top light performance characteristics identified by Tolkowsky. This percentage dictates the overall proportions of the diamond, which in turn directly impact how light reflects off the facets in the stone. Eventually diamond cutters in America adapted their production of round brilliant cut diamonds based upon the findings of diamond cutters like Henry Morse and Marcel Tolkowksy, and produced what became known as the American Ideal Cut Diamond, which is cut to the following range of proportions: Total depth between: 59.9 – 63% The quality and value of a diamond is defined according to the 4Cs: carat, colour, clarity and cut. It also means that the diamond will sell at a premium. Its symmetry, with 58 precisely placed facets, produces the ultimate in luster and beauty.