DH and I have just celebrated our 25th wedding anniversary. I have a lovely diamond and sapphire eternity ring that I wear on the third finger of my right hand because it is very elaborate ( couldn't find one with stones that went all round so had one with circles but all on top) As the eternity ring is a bit ott I only wear it for special occasions so DH would like to buy me a more practical ring to wear everyday. I have quite small hands and I'd like something plain but a little bit unusual, fairly contemporary. Budget is £500 - please help me with some ideas.