This (previously an engagement) ring is from Shane Co. The cut is cushion with a beautiful diamond outer lining as well as diamonds cascading down 3/4 of the band. The carat of the center diamond is 1.25 and the band is white gold in a ring size 7. It’s very difficult to show but in the inner part of the band is a tiny tiny engraving that says “Shane Co.” Bought for 9k Unfortunately I didn’t get the authentication certificate along with the breakup so I do not have that to provide but if you’re truly interested and need an authentication before purchasing then I will consider taking it to get appraised. Let me know if you have any other questions, I will do my best to answer them.