The 4Cs – color, clarity, cut, and carat weight – were created by GIA to describe a diamond’s appearance and define its quality. Before GIA created the diamond 4Cs and the International Diamond Grading System™, there were as many ways to describe diamonds as there were methods for evaluating their quality. GIA transformed the way diamonds were bought and sold by creating a common language for diamonds. Learn more about the history of the 4Cs in this short video! | 4Cs of Diamond Quality by GIA
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