Before buying a diamond ring, it helps to understand the Four Cs—cut, color,...
https://www.bookmarking-jet.win/before-buying-a-diamond-ring-it-s-important-to-understand-a-few-key-things
Before buying a diamond ring, it helps to understand the Four Cs—cut, color, clarity, and carat—to know what you’re getting. Check the GIA grading report number to confirm the diamond’s quality and authenticity