When designing jewelry, the sky is the limit as far as color choices, stones, shapes and over-all design. But just like a cherry on a sundae or the star on the top of a Christmas tree, no outfit is complete without jewelry.
 
I would start with making a choice on your bridesmaids dresses. Take your Maid of Honor with you to help you make a decision because usually there are more choices of bridesmaid dresses than there are Wedding gowns in the boutiques. This will help you get some feedback as far as what will work for all of the girls and she can also try some of them on, since they normally look very different on a person than they do on the rack.