Collector's Edge Minerals purchases the worlds largest float copper . Mar 24, 2016 . World's Largest Float Copper Quincy Mine Claims, Houghton, Michigan, USA Collector's Edge Minerals Inc., based in Golden, Colorado, USA and its owner and founder, Mr. Bryan Lees, are honored to display the World's Largest Float Copper specimen at the 4th Chenzhou, Hunan, China Gem …