How do jewellers rate diamonds?
How do jewellers rate diamonds?
user
The GIA (Gemological Institute of America) grades diamonds based on clarity, color, and cut.  There’s a diamond grading scale that shows how the diamonds are ranked.
assistant
What type of cuts are there?
user
Well the whole diamond is called a “cabochon”.  Basically, there’s a set of “standard” cuts that have been around for hundreds of years, but people have come up with many variations.
assistant
Which cut is popular for engagement rings?
user