What better to give as a gift than a custom-designed piece of opal diamond ring? Whether it's a gift for graduation, birthday, Christmas or even an engagement ring, everyone likes to have something made especially for them. Having a unique piece of jewelry means that someone thought so much of you that they wanted to give you something that no one else would have. The custom designed opal gemstone that you have would be the only one that they would like and no one could ever say that it is a copy of another piece.