Before buying a diamond ring, it helps to know a few key things. Check the Four...

https://iris-wiki.win/index.php/Yellow_Gold_vs_Platinum_Engagement_Ring:_Pros_and_Cons_Explained

Before buying a diamond ring, it helps to know a few key things. Check the Four Cs—cut, clarity, color, and carat—to understand the diamond’s quality. Look for a GIA grading report number to verify authenticity