Before buying a diamond ring, it helps to know the Four Cs—cut, clarity, color,...
https://www.coast-bookmarks.win/before-you-buy-a-diamond-ring-it-s-smart-to-check-a-few-key-things-look
Before buying a diamond ring, it helps to know the Four Cs—cut, clarity, color, and carat—and how they affect what you’re paying for. Check for a GIA grading report number to verify quality