The Groom's ring. Guys typically don't give much input into a wedding and the ring is no exception. Don't just drag him to a jewelry store and have him pick one...let him know that he can get creative with it. My wedding ring is made entirely of a Brazilian's absolutely stunning, lightweight and is extremely durable (that was my biggest concern is it would get ruined cause I'm hard on my ring). It can also be a way to save money. Bottom line make sure he knows that he doesn't have to go with traditional materials, etc. in picking the symbol of his eternal love.