This is a diamond and white gold engagement ring, approximately size 4.5. The diamond is asscher cut, F, VS1, very good and 1 Carat. I am unsure why the certificate says emerald for the cut, it was purchased as asscher and verified by gemologists as asscher. The ring was purchased for 12k in 2009. There are diamonds of equivalent c/c/c surrounding the center diamond and extending down the sides of the shank. I am happy to provide any additonal pictures or information you need.