Jewelry owned by 50 Cent, Notorious B.I.G., Alicia Keys, Tupac Shakur, Diddy, Pharrell and many more will go to auction in what's being called "Hip Hop's Crown Jewels." The auction will feature over 70 pieces of custom-made bling, worth an estimated $3 million and worn by hip-hop's finest. The Phillips de Pury Company will host the auction, with three non-profit organizations run by Russell Simmons' the benefactor. Among the prized items is Tupac's "Diamond and Ruby Crown ring," Slick Rick's multicolor diamond eye patch, Lil Jon's "Guinness World Record Diamond Pendant" and Diddy's "Important Diamond Bracelet." The bling hits the gavel October 1st, and the bidding goes down here.