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Diamonds are graded for clarity under 10x loupe magnification. Grades range from Flawless (diamonds which are completely free of blemishes and inclusions), to Included 3 (diamonds which possess large, heavy blemishes and inclusions that are visible to the naked eye). F Flawless: no internal or external flaws, extremely rare.
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Diamond is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light — giving the diamond its characteristic "fire" — make it useful for industrial applications and desirable as jewelry .
Grading Diamond Cut. GIA provides a diamond cut quality grade for standard round brilliant diamonds that fall into the D-to-Z color range. To develop their Cut Grading System, GIA performed extensive computer modeling of round brilliant diamonds over a 15-year period and conducted more than 70,000 observations on actual stones to validate the research.
The concentration of diamond particles in the paste determines its cutting ability and the surface finish it can achieve. Each application involves a degree of concentration to produce the best surface finish. Light concentration is used for bringing out a finish in finer sizes with its diamond particles, typically 10-20%.
Additionally, a deeply cut diamond typically seems smaller than the ones with an ideal cut. GIA Cut Grades. A round brilliant cut diamond will receive a GIA diamond cutting grade between Excellent and Poor. The symmetry, polish, brightness, and fire of a diamond are just a few of the variables that determine its cut grade.
22 de ago. de 2023 · Cut's Importance. The diamond cut is perhaps the most critical factor in assessing brilliance, fire, and scintillation. Given that it is the only C that is not a natural but a human factor, it can be manipulated to save much of the original rough diamond while cutting it.
