Before buying a diamond ring, it’s smart to know the basics like the Four...

https://gbubemaster.gumroad.com/p/who-reviewed-the-hatton-garden-diamond-ring-advice-article

Before buying a diamond ring, it’s smart to know the basics like the Four Cs—cut, color, clarity, and carat—to understand what you’re getting. Check if the diamond comes with a GIA grading report number for authenticity