There are bands which have a little dip in the front, some have a curve, some have a full "v" shape (chevron).
This is just to show you a shape, I think you should just have plain gold to go with your solitaire, though -
http://www.jcpenney.com/jcp/Products.aspx?DeptID=0&CatID=031145&Grptyp=PRD&Ite mId=1200ecb&cmRef=http://www.jcpenney.com/products/C035273.jsp