#3. Make Sure It’s Quality
When it comes to engagement rings, size is not all that matters. Most women are not going to complain if you want to slip a two-carat rock on her left hand, but the quality of the diamond is determined by its color, cut and clarity, not just carat.
Back in the 1940s the Gemological Institute of America, GIA, created the 4 Cs as a way to objectively compare and evaluate diamonds. Any decent jeweler will educate you about the 4 Cs. If they do not, you might want to reconsider your choice of jeweler. (Is her operating out of the back of a van? Yes? Definitely reconsider.) You must have a clear understanding of the 4 Cs to ensure you are getting the best quality diamond for your money.