Before buying a diamond ring, knowing the Four Cs—cut, color, clarity, and...

https://hatton-garden-jewellers.co.uk/7-things-to-check-before-buying-a-diamond-ring

Before buying a diamond ring, knowing the Four Cs—cut, color, clarity, and carat—makes all the difference. Check if the diamond has a GIA grading report number for trusted quality. Also think about the setting and metal to match your style and comfort