Does an engagement ring need to be a diamond?

* No, some women request another stone other than a diamond for an engagement ring. Some women don't even want an engagement ring and may have a plain wedding band or, a wedding band with their favorite gems set into the band. If you are male and buying the ring as a surprise for your girlfriend make sure she does want another gem instead of a diamond. It is also etiquette to take your girlfriend with you so she can pick out the ring.