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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.
International Gemological Institute (IGI) is a gemological organization which certifies diamond, colored stone and jewelry. It was established in 1975 in Belgium. It was established in 1975 in Belgium.
This year also brought the new "Blue Diamond" (FAC) and "Red Diamond" (FBC) engines. A post-war version of the 269 cubic inches (4.4 L) Blue Diamond became the "Super Blue Diamond" when installed in the post-war medium L-line trucks. The Blue Diamond engine lived on until the early 60's renamed as Black Diamond engines, the BD-282 and BD-308. [10]
The World Diamond Council is an organization representing the entire diamond value chain including representatives from diamond mining, manufacturing, trading and retail. The council was established in July 2000. The purpose was to create a system to keep the supply chain of diamonds as free as possible from conflict diamonds. [1] [2] [3] [4]
The wholly owned operations are in southern Africa and Canada. Also wholly owned are Forevermark, De Beers Jewellers, [80] the International Institute of Diamond Valuation, De Beers Ventures, the International Institute of Diamond Grading & Research and Element Six (Umicore has a 40% stake in Element Six's abrasives division).
The International L series was introduced by International Harvester in fall 1949 as the replacement for the ... Silver Diamond 220 OHV inline-six, 220.5 cu in ...