Casino bosses are competing with each other over who has the biggest diamond. Stanley Ho purchased a huge 218 carat diamond currently on display in one of his Macau casinos only to be beaten by Steve Wynn who purchased a 231 carat plum diamond. The diamond owned by Mr Ho is the largest in the world of its type, a cushion diamond and is nicknames “The star of Stanley.” Wynn’s diamond is going to be displayed in one of his new casinos currently being developed in Las Vegas.