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NABL accredited Weights
Thecarat, the standard unit of weight for diamonds and other gemstones,takes its name from the carob seed. Because these small seeds had afairly uniform weight, early gem traders used them as counterweightsin their balance scales. The modern metric carat, equal to 0.2 grams,was adopted by the United States in 1913 and other countries soonafter. Today, a carat weighs exactly the same in every corner of theworld.