These proportions allow GIA to evaluate how successfully a diamond interacts with light to create desirable visual effects such as:Use of this site signifies your agreement to its terms of use. Cushion Cut Diamonds - A Complete Guide. The 4Cs means two very important things: diamond quality can be communicated in a universal language, and diamond-buying consumers can know exactly what they are about to purchase. This classic cut has been around for almost 200 years, and for the first century of its existence was the most popular diamond shape (similar to round cut today). A diamond certificate verifies each diamond’s specifications, including its color grade, carat weight, clarity grade and cut grade. The Oval Cut Diamond. Starting with the 4Cs – cut, clarity, color, and carat – the report includes precise measurements and shape, as well as a plot or map of the individual diamond’s characteristics. Diamonds with low cut grades often appear glassy or dull, or just plain small, and they don’t live up to our standards of great quality at a great value.Diamonds that are accompanied by GIA grading reports are the most highly valued in the industry.
Please try again later.We're sorry, but our system was unable to initialize Google Recaptcha to ensure request is from a human.Enter your email and you'll instantly:Two diamonds cut with optimal proportions won’t necessarily have the exact same light performance or beauty. Because the overall Cut grade already incorporates both factors, it should be used as the primary determinant when choosing a diamond. We often think of a diamond’s cut as shape (round, heart, oval, marquise, pear), but a diamond’s cut grade is really about how well a diamond’s facets interact with light. In fact, when comparing our cut grade to that assigned by GIA, the Lumera grade is equal to or lower than GIA 90% of the time.Click below to speak to a Diamond Consultant or customer service.For those on a budget, primarily concerned with size, a diamond of Fair - Good cut may be an acceptable choice, especially in fancy shapes. The distance from the bottom of the girdle to the culet is the pavilion depth. So, we're moving forward with once-in-a lifetime offers to help you plan and celebrate love. GIA is a nonprofit 501(c)(3) organization. Blue Nile estimates and assigns cut grade standards for non-round (fancy shaped) diamonds based on their table and depth percentages.Because of each country's product availability, the selection on this site may not be the same as the one you were previously on.This rare cut represents roughly the top 3% of diamond cut quality. These small, yet essential, factors determine the diamond’s beauty and price.Established in 1931, the non-profit Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. These diamonds tend to appear dull or glassy.Have you ever noticed how many surfaces a diamond has? When light meets any facet of a diamond, it will either reflect (bounce back) or refract (bend while passing through the facet). The GIA Diamond Cut Scale for standard round brilliant diamonds in the D-to-Z diamond color range contains 5 grades ranging from Excellent to Poor and is the definitive scale for classifying diamond cuts. © 2002 - 2016 Gemological Institute of America inc. These two words are interchangeable to represent the cutting style, proportions, and finish necessary to bring out a diamond’s sparkle, brilliance, and beauty.Every Astor by Blue Nile™ Diamond is cut to gather and reflect the most light possible.
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