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https://www.gemsociety.org/jewelry-lapidary/grading-gemstones-and-diamonds/
Grading Gem Carvings. Gem carvings are judged on material, workmanship, and artistry. Learn how to apply these criteria to a piece with our step-by-step guide. Exposing Diamond Overgrading at EGL Labs. The effects of the 2014 scandal over diamond …
https://www.firemountaingems.com/Resources/encyclobeadia/charts/E893
There are a lot of steps to grade a gemstone. Each step of grading focuses on a different feature and has many details that create the overall grade determination. It can be difficult to understand gemstone grades without training, so with the help of the Fire Mountain Gems and Beads gemologists we've created a chart to help clarify the basics.
https://www.americangemsociety.org/buying-diamonds-with-confidence/ags-diamond-grading-system/
When writing the grades of a diamond using the AGS Scale, diamond Cut grade is first, then diamond Color, Clarity, then Carat Weight—in that order. If a diamond possessing the finest diamond Cut grade is also colorless, free of inclusions and blemishes, and weighs one carat, it would be written as: 0/0/0–1.000 carat.
https://www.jewelrynotes.com/how-to-grade-diamond/
To grade the cut of a diamond, you need to evaluate some of its measurements and proportions that are considered important for how the stone reflects light. Grading cut is a complex process, but you can determine approximate cut quality by looking at some key ratios and characteristics.
https://www.gemsociety.org/article/a-consumers-guide-to-gem-grading/
The top three grades that indicate colorlessness for diamonds (D to F) vary subtly only by differences in transparency. The next four grades cover “nearly colorless” (G to J), which means diamonds with these grades will appear colorless when set in jewelry. It takes an expert in a laboratory setting to distinguish between grades G to J.
https://www.firemountaingems.com/resources/jewelry-making-articles/e40a
Although there are A grades of gemstone beads, the largest and best-quality gemstones are generally used for faceted gems in the high-end jewelry industry. Bead cutters will "high-grade" the rough and use the better materials to cut the A grades, and according to the stone variety separate into the B and C grades, and so on. 2.
https://www.wealthysinglemommy.com/what-is-jewelry-appraisal/
Feb 12, 2019 · The internationally recognized laboratories at the Gemological Institute of America (GIA) or International Gemological Institute (IGI), will grade your diamond or other gemstone jewelry, determining the cut, color, clarity and exact size, as well as other attributes like name brand, and market value, to give you a certified lab report with detailed information about the metal, diamonds, and …Estimated Reading Time: 8 mins
https://4cs.gia.edu/en-us/diamond-buying-guide/
Grades range from ‘Excellent’ to ‘Poor.’ Diamond Carat refers to a diamond’s weight. Generally speaking, the higher the carat weight, the more expensive the stone. Two diamonds of equal carat weight, however, can have very different quality and price when the other three Cs are considered.
https://www.riogrande.com/
Rio Grande jewelry making supplies for the best in jewelry findings and gemstones, tools, jewelry supplies and equipment, and the packaging and display items essential to the success of your jewellery business since 1944. Rio Grande offers competitive pricing, excellent service, ordering convenience and fast product delivery.
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