Hazrat Abu Hurairah (may Allah be pleased with him) narrated that the Noble Prophet (peace and blessings of Allah be upon him) forbade men from wearing gold rings.

Narrated Abdullah bin Umar (may Allah be pleased with them): The Messenger of Allah (peace and blessings of Allah be upon him) had a gold ring made and he used to wear it, placing its stone towards the palm of his hand. Then people also had similar rings made. After that, one day the Prophet (peace and blessings of Allah be upon him) sat on the pulpit, took off his ring, and said: I used to wear it and kept its stone on the inside, then he took it off and threw it away and said: By Allah! I will never wear it again. So the people also took off their rings and threw them away.