Ka-Ching! Kim Kardashian engagement ring reportedly fetches $749,000

Kim Kardashian's 20-carat diamond engagement ring, a remnant of her 72-day marriage to NBA basketball player Kris Humphries, was auctioned Tuesday in New York by Christie's for $749,000, US Weekly reported.

Christie's auction house confirmed the sale of a 20-carat ring to an anonymous buyer. It did not reveal whether it was the ring that Humphries gave Kardashian.

The ring "far exceed the presale estimate" of $300,000 to $500,000, said Gabriel Ford, a spokesman for Christie's.

"This impressive diamond ring was sought out by two bidders in the back of the room, one online bidder and was ultimately won by a bidder on the phone," Ford said.

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Humphries, an NBA forward, accuseaccused Kardashian of fraud by entering the marriage only to make millions of dollars with their wedding, Humphries' lawyer, Marshall Waller, told a Los Angeles County Superior Court judge.

The August 20, 2011, wedding was aired in October on E! Entertainment in a two-part special titled "Kim's Fairytale Wedding: A Kardashian Event."