Kris Humphries Sells Kim Kardashian's Giant Engagement Ring

Three months after the finalization of their divorce, Kris Humpries, Kim Kardashian's ex-husband, is auctioning off one of the last loose ends of the couple's 72-day marriage: her 20-carat diamond engagement ring, Us magazine reported.

The NBA player allegedly listed the ring for an October 15 sale at the Christie's auction house in New York City. According to RumorFix, Humphries is not named as the seller but the ring is identical to the one Kardashian wore during her brief engagement.

However, a representative from Christie's confirmed to Us Weekly that the ring listed is a "Lorraine Schwartz creation with a 16.21-carat center diamond and two 1.80-carat side diamonds -- the exact dimensions of Kardashian's ring." The representative added that they could not reveal the name of the seller.

"It is 100 percent the same ring," a source close to the reality star and new mom, 32, tells Us Weekly. "Kim has been waiting for the day he would auction it. Everyone always asked what Kim did with the ring -- she silently gave it back over a year ago! And Kris waited until the divorce was final to sell it."

"The ring is definitely not worth $2 million, not even half of that," the source told Us Weekly. The source also added that Kardashian paid for it herself.