Question: What is the ruling on wearing a ring known as a Diblah on the right hand for the suitor and on the left hand for the fiancee, bearing in mind that this Diblah is not made of gold?

Answer: We know of no basis for this deed in the Islamic Law so it is better to leave it, whether the Diblah is made of silver or anything else; but if it is made of gold, then it is forbidden for a man, because the Messenger (sallallaahu alaihi wasalam) forbade men from wearing gold rings.

Shaykh `Abdul-`Azeez Bin Baz

Fatawa Islamiyyah, Darussalam, volume 5, page 210