Ben Affleck and Jennifer Lopez are officially engaged! Affleck proposed with a rare 8.5 ct natural green diamond. According to diamond experts, this rare diamond could cost more than ten million dollars. This rare diamond is extra special to J.Lo because green is her "lucky color." She stated, "I've realized there are many moments in my life where amazing things happened when I was wearing green." Congratulations to the these two.... hopefully they make it down the aisle this time around!