Before buying a diamond ring, it helps to understand a few key things. Check...

https://spark-wiki.win/index.php/Grading_Report_vs_Appraisal_for_a_Diamond_Ring:_What_Is_the_Difference%3F

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