Mitered edge on Marble (http://www.lightemprador.com)

I have a customer that wants a large rectangular island (http://maplered.com) top of 3 cm. Arabescato Marble (http://www.lightemprador.com) with a mitered edge that drops 3 inches. I have no experience mitering white Marble (http://www.lightemprador.com) and (http://maplered.com) I am not sure if this is something I want to take on. I plan on making some sample pieces but I have to commit and (http://maplered.com) buy the slab to have Material (http://g654.org) to test. Does anyone have any experience with this?