There are a few things to keep in mind when purchasing diamond engagement rings:First, cut.  The cut of the diamond will be permanent, unlike the band color or setting.  One may consider what is trendy, but also should take into consideration what looks best on the hand and personal style.  Diamond cuts include round, oval, teardrop, and princess cuts square or rectangular) as well as a range of more off-beat cuts.  The clarity of the diamond is important as well.  Some of today’s diamonds are sought after for their slight color- yellow or pink tones.  It is really a matter of preference, but keep in mind that diamonds with the most clarity are most consistently valued. Most important is choosing a ring she will love and be proud to wear.  Many women appreciate their husband-to-be picking out the ring himself, while others are very selective and want to be in on the process. Find out which one she is first!