With regard to the wedding ring, which is worn on the occasion of marriage, this is not one of the customs of the Muslims. If it is believed that it generates love between the spouses, and that taking it off and not wearing it will have an effect on the marital relationship, then this is regarded as a form of shirk and is a kind of jaahili belief. Based on the above,
it is not permissible to wear a wedding ring under any circumstances.
Firstly, because it is an imitation of those who are no good; it is a custom that has come to the Muslims from the non-Muslims.
Secondly, if that is accompanied by the belief that it has an effect on the marital relationship, then this is a kind of shirk. Laa hawla wa laa quwwata illa Billaah (there is no power and no strength except with Allaah).
http://islamqa.info/en/ref/21441