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Color grading of diamonds was performed as a step of sorting rough diamonds for sale by the London Diamond Syndicate. As the diamond trade developed, early diamond grades were introduced. Without any co-operative development, these early grading systems lacked standard nomenclature and consistency. Some early grading scales were; I, II, III; A, AA, AAA; A, B, C. Numerous terms
In 2012, together with his family, he established a Gemological laboratory in Bangkok called Lotus Gemology. In 2017, Lotus Gemology published Hughes' book Ruby & Sapphire: A Gemologist's Guide, [7] covering the corundum gem species. [8] [9] In 2019, Tongji University created an exhibit centering on Lotus Gemology's photography. [10]
International Gemological Institute (IGI) is a gemological organization which certifies diamond, colored stone and jewelry. It was established in 1975 in Belgium. [1] On May 21, 2023, Blackstone Group announced their acquisition of IGI. [2]
According to Snyder, different-colored lotus flowers have different meanings in general and in specific cultures and religions. White Lotus Meaning : The white flower signifies beauty, grace ...
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 ] As of 2024, the institute is headquartered in Carlsbad, California , and operates in 13 countries, with 11 campuses, 9 laboratories, and 4 research centers.
The Rolling Stones review, Hackney Diamonds: Keith Richards and Ronnie Wood rip through riffs like guitarists half their ages Mark Beaumont October 9, 2023 at 3:05 PM
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Aurora Gems was founded by Harry Rodman (1909–2008) a gold refiner from the Bronx, and Alan Bronstein, a diamond dealer from New Jersey, who began collecting colored diamonds in 1979. The original 260-gem collection was on public display at the American Museum of Natural History in New York City from 1989 to 2005 in the Morgan Hall of Gems.
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