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In 1953, Liddicoat introduced the GIA diamond grading system - a practical approach to grading the quality of colorless to light yellow polished diamonds on the basis of color, clarity, and cut. A central feature was the D-to-Z color grading system for faceted colorless to light yellow diamonds—the vast majority of diamonds seen in the trade.
Through its library and subject experts, GIA acts as a resource of gem and jewelry information for the trade, the public and media outlets. [2] In 1953 the GIA developed its International Diamond Grading System and the "four Cs" (cut, clarity, color, and carat weight) as a standard to compare and evaluate the quality of diamonds. [2]
Diamond certified FL (flawless) by the GIA Two diamonds of grade VS 1 and SI 2 respectively. The GIA diamond grading scale is divided into six categories and eleven grades. [2] The clarity categories and grades are: [3] Flawless category (FL) diamonds have no inclusions or blemishes visible under 10× magnification. [3]
The GIA began grading cut on every grading report for round brilliant beginning in 2006 [31] based on their comprehensive study of 20,000 proportions with 70,000 observations of 2,000 diamonds. [citation needed] The single descriptive words are as follows: Excellent, Very Good, Good, Fair, and Poor. [30]
The subsequent FTC restrictions undoubtedly encouraged the establishment of today's GIA color grading system. The new GIA grading system had no place for the effect of fluorescence on color and the desirability of fluorescence in a diamond began to wane in the years that followed. Diamonds with fluorescence were marked down in price.
Bill Clinton “Hillary and I mourn the passing of President Jimmy Carter and give thanks for his long, good life,” Clinton, the country's 42nd president, said in a statement on Sunday.
The "passivity" agreement FDIC wants BlackRock to sign is designed to assure bank regulators that the giant money manager will remain a "passive" owner of an FDIC-supervised bank and won’t exert ...
IGI provides its services to the public through diamond dealers, and jewelry manufactures. IGI provides independent grading reports, colored stone reports, identification and appraisal reports, diamond authentication and attestations of origin, and laser inscription services.