Convert long tons (uk) to carats instantly.
Definition: A long ton is a British imperial unit of mass equal to 2,240 pounds, or about 1,016.0469 kilograms.
History/origin: The long ton was part of the British imperial system and historically used in maritime trade and heavy industry before the widespread adoption of metric units.
Current use: Long tons still appear in some UK maritime, industrial, and historical contexts, though they are far less common than metric tons today.
Definition: The carat is a gemstone mass unit. One ct is exactly 200 mg, which is the same as 0.2 g.
History/origin: Gem traders once used carob seeds as small weight references; modern standards replaced that practice with the fixed 200 mg metric carat.
Current use: Ct is used for diamonds, sapphires, rubies, emeralds, pearls, appraisal reports, jewelry listings, auction catalogs, and gem certification documents.
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