In an attractive diamond, the reflections should appear even and balanced in size. Sparkle refers to the spots of light that flash when the diamond, you or the light source moves. Scintillation is a combination of sparkle and pattern.Look for red, blue, yellow or orange flashes as you rock and tilt it under store spotlights. Fire results when white light traveling through the diamond is dispersed into its rainbow of spectral colors.In general, the brighter a diamond is, the higher its grade will be. Well-cut diamonds are brighter than poorly fashioned ones, even if they’re of equivalent size, color and clarity. Brightness – often called brilliance – is the effect of all the diamond’s internal and external reflections of white light, best observed under diffused lighting.There are optical effects that make a beautiful diamond look the way it does together, they give the diamond life and determine its visual appeal – especially when you move it. You might hear: “Isn’t it beautiful? See how much it sparkles. Words like “sparkle,” “fire,” “brightness” and “pattern” are used when talking about a finished diamond’s appearance. Diamonds in the Very Good and even Good cut grades are also beautiful they only suffer by comparison with the very best stones. If all else is equal, an Excellent cut grade pretty much guarantees an extremely attractive diamond. If you look at the photo above, you can see how diamonds with Excellent, Good and Poor cut grades, from left to right, compare to each other. Given the choice, most people would pick either of the first two diamonds instead of this stone. The Poor cut grade diamond has much more prominent dark areas or dullness. The Good cut grade diamond isn’t quite as bright – reflections aren’t as sharp and there’s more darkness or dullness in the diamond. This tells you that the cutter made the best possible use of the rough. It shows an even pattern with good contrast between light and dark areas, so the reflections appear crisp and well-balanced. There are five cut grades: Excellent (EX), Very Good (VG), Good (G), Fair (F) and Poor (P).Ī diamond with an Excellent cut grade is very bright. The GIA Cut Grading System applies to the most popular cutting style – the standard round brilliant – and all clarities across the D-to-Z color range. The GIA Cut Grading System, introduced in 2005 and validated by thousands of observations by retailers, manufacturers and the public who looked at real diamonds and described why they thought certain diamonds were the best looking, can help you understand what to look for in a well-cut diamond. Those four factors – color, clarity, cut and carat weight – are the basis of the International Diamond Grading System that GIA created in the early 1950s as the universal standard of diamonds. That is why for many people, cut is the most important of the 4Cs − the system developed by GIA to describe a diamond’s quality. This is what gives a diamond its face-up appearance and what makes it appealing – or not. When it interacts with light, each facet and angle affects the amount of light returned to the eye. You want your friends and family to stop, stare and admire the stone dancing on your finger or from your ears.Ĭarat weight, color, clarity, and let’s face it, price, help you decide which diamond you like best, but you might not understand how your diamond’s cut – how its facets and angles are cut and polished − affects its overall appearance – its “Wow” factor.Ī beautifully finished (cut) diamond is dazzling every facet displays the craftsman’s skill and care. Courtesy of Harold & Erica Van Pelt.Īsk anyone what the most important characteristic of their diamond is and they’re likely to say it’s the “Wow” factor. Because of its popularity, assessment of this cut has been the subject of considerable research. The round brilliant is the most popular diamond cut. Comprehensive CAD/CAM For Jewelry Certificate
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