If you want proper old fashioned service and great advice you should check out Pilkington Jewellers. I have bought several pieces from them and have been delighted with the quality and the price. The staff are lovely and really know their stuff. They will help you to design your own jewellery which they make up for you. Big plus, all the diamonds are conflict-free. If you don't know why that is important you should do some research before you buy a diamond.