(CNN) - Kim Kardashian's engagement ring from Kris Humphries sold for big bucks at auction Tuesday.
The 20 carat sparkler went for $749,000 at Christie's in New York, according to US Weekly.
That's far more than the auction house expected.
It was bought by an anonymous phone bidder.
Humphries reportedly sold the ring, although Christie's would not disclose his name.
E! News reports the proceeds will go to charity.
Kardashian and Humphries split in 2011 after just 72 days of marriage.
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