프로포즈용 다이아반지 어디서 구입하는게 좋을까요? 추천 부탁드려요.

h 216.***.230.8

I recommend buy a ring at Costco.
You should give her diamond rings every 5 year or 10 year.
So, if you give her an expensive ring for the first time, her expectation will be higher next time.