Re: Wedding ring for men
Muhammad (SAW) took some silk in his right hand and some gold in his left, declaring, “These two are haram for the males among my followers.” (Reported by Ahmad, Abu Dawud, al-Nisai, Ibn Hayyan; lbn Majah, who adds “but halal for the females.”)
'Umar reported that he heard the Prophet (peace be on him) say, “Do not wear silk, for those who wear it in this life shall not wear it in the Hereafter.” (Reported by al-Bukhari and Muslim. A Similar hadith is reported by them on the authority of Anas.)
Muhammad did permit silver rings. According to ibn Umar, al-Bukhari reported the former saying, “The Messenger of Allah (peace be on him) wore a silver ring. After him, Abu Bakr and then Umar and Uthman wore it, until it fell off his finger into the well of Arees.” (Reported by Bukhari). There is no prohibition against other metals such as Iron or copper.
Check out the GS link too.. on same topic :
http://www.paklinks.com/gs/religion-scripture/114343-men-not-allowed.html