I really love this idea, to use a vintage stone as the 'something old' in a wedding ring, the setting is of recycled metal, and the stones from conflict-free mine.
http://www.stylelist.com/2011/01/26/natalie-portmans-eco-friendly-engagement-ring/?ncid=txtlnkusstyl00000004
http://www.stylelist.com/2011/01/26/natalie-portmans-eco-friendly-engagement-ring/?ncid=txtlnkusstyl00000004