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How is a diamond graded?
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Aug 30, 2024 · The G color grade is the highest, best grade in the “Near Colorless” range of the GIA’s scale, which covers diamonds graded G to J. Although G color diamonds have some tints of color, they’re almost impossible to detect with the naked eye.
Jul 8, 2015 · The 23 color grades on the GIA Color Scale (or diamond color chart) are subdivided into five subcategories, which are: colorless (D-F); near colorless (G-J); faint (K-M); very light (N-R); and light (S-Z). Each letter grade has a clearly defined narrow range of color appearance.
- The Gia Diamond Color Scale
- White Diamonds
- Cape Diamonds
- Lemonade Diamonds
- Diamond Color Grades as Ranges
- Diamond Color Grades and Price Jumps
- The Effect of Gold Colors on Diamond Color
- Buying Diamonds Below J Color
- Diamond Fluorescence
- Professional Diamond Color Grading
The Gemological Institute of America (GIA) color scale for white or colorless diamondsranges from grades D to Z. Any stone within that range falls within the "normal color range." The most highly valued diamonds have no color. Thus, the more color a stone has (yellow or brown), the lower the grade. Yellow or brown diamonds that make it past the Z g...
Of course, the most valuable diamond color is D. A diamond of this grade commands a premium simply because of its complete colorlessness. You are probably familiar with the idea of diamonds being white. However, 98% of gem-quality diamonds actually contain some amount of yellow due to nitrogen impurities within the diamond.
All faintly yellow diamonds (not colorless and not fancy yellow) are called "Cape diamonds."However, some jewelry lines will specifically market only stones of lower color grades, K to Z, as "Cape diamonds" in order to promote them as affordable alternatives to "non-Cape" diamonds.
Sometimes, vendors market W-Z color grade diamonds specifically as "lemonade" or near-fancy yellow diamonds.
Consumers and vendors pay a great deal of attention to specific color grades when a stone sits on the high end of the scale. Once colors move past K, however, the grades are often given as ranges, such as U-V, W-X, and Y-Z.
You'll find an enormous price difference between a D and an E color diamond. The next biggest price difference lies between an F and a G color diamond. That's understandable, as G falls into the "near colorless" rather than "colorless" category. Just as diamonds have "magic number"carat sizes, they also have "magic letter" color grades. You can fin...
Stones in the I, J, and K range start to look faintly yellow or brown, especially in larger carat sizes. Jewelers can disguise these colors, however, by setting the gems in yellow or rose gold. The color of the metal can make lower grade stones look whiter in contrast.
Before purchasing a diamond below J in color, keep in mind that the brown or yellow color will be fairly noticeable. Generally, buying diamonds below J isn't advised. Nevertheless, some people prefer the soft, mellow look of a faintly yellow diamond as opposed to the hard, icy brilliance of a white diamond. Perhaps for these consumers, the pale yel...
A third of all diamonds fluoresce, and 90% of fluorescent diamonds fluoresce blue. In diamonds with high color grades, especially D-F, strong fluorescence is undesirable since it can make them appear milky. Fluorescent diamonds with higher color grades cost 15% less than non-fluorescent diamonds. On the other hand, diamonds of I color and below act...
For the average consumer, differentiating diamonds with color G and above proves difficult. (Try it for yourself in this diamond color sorting quiz!) So, how do professional diamond graders tell the difference? They use a master set of diamonds. These include stones representing the lightest possible color for each diamond color grade.
D is the highest color grade awarded only to completely colorless diamonds. To the naked eye, D color diamonds feature an icy whiteness that contains no color at all. Shop D Color Diamonds
- Colorless (D, E, F) The colorless grades are D, E, and F. The D color diamond is the highest color grade a diamond can receive. This means that the diamond is completely colorless, and there are no visible tints of yellow or brown in it.
- Near Colorless (G, H, I, J) Containing noticeable color only when compared to higher color grades, G and H color diamonds still provide an excellent value.
- Faint Yellow (K, L, M) K, L, and M color diamonds are identified as having a "faint tint" on the diamond color scale. But even with the presence of color, these grades of diamonds can still emit fire and beauty.
- All About Fancy Colored Diamonds. Colored diamonds or more commonly known as "fancy diamonds," are beautiful and eye-catching gems. They are naturally created when trace elements interact with the billions of carbon atoms in the crystal lattice during the creation of the diamond resulting in a unique color.
Summary in a few lines: GIA grades diamonds with letters from D to Z, with D being purist, most colorless diamond grade, and Z as the last grade with light yellow. The higher the grade, the more expensive the diamond, with an exception to fancy color diamonds of course.
Jan 26, 2016 · GIA determines a diamond color grade by comparing the diamond to a set of masterstones. These are diamonds that have been carefully selected to meet specific criteria for carat weight, color, clarity and cut. Each masterstone in the set represents a letter grade.
