Kris Humphries makes an appearance on 'Jimmy Kimmel Live' in Hollywood. (August 14, 2013)

Kris Humphries makes an appearance on ‘Jimmy Kimmel Live’ in Hollywood. (August 14, 2013)

*Kim Kardashian’s ex-husband Kris Humphries reportedly made hundreds of thousands of dollars in profit from the sale of her engagement ring, and its designer Lorraine Schwartz is reportedly pissed.

The Boston Celtics star auctioned off Kim’s 20-carat diamond ring for $749,000 at Christie’s auction house in New York City on Tuesday, and jewelry designer Schwartz is reportedly furious because the bling – which features a 16.21-carat center diamond between two 1.8-carat diamonds – is actually worth $2 million.

A source told gossip website RadarOnline.com that Lorraine was hoping Hump would return the ring to her for a refund as she gave him a ”huge discount” and sold it to him for $250,000 in 2011 because Kim is her friend.

Lorraine Schwartz

Lorraine Schwartz

The insider said: ”He could have returned [the] ring, very low-key and would have had his money returned. Lorraine Schwartz took a huge loss on it, and would have appreciated first offer of refusal before it was put up for auction.”

The ring  was expected to sell for $300,000 to $500,000. Listed as “An impressive Diamond Ring, by Lorraine Schwartz,” it was included in Christie’s “Magnificent Jewels” collection that went on the block in New York City. The ring’s lot text noted that it was “property of a gentleman” and that a portion of proceeds would go to charity.

Meanwhile, Kim, 32, reportedly doesn’t care that Kris, 28, has profited from the sale of her ring.

A source close to the ‘Keeping Up with the Kardashians’ star – who dumped Kris after just 72 days of marriage in October 2011 and now has a four-month-old daughter, North West, with her boyfriend Kanye West – said: ”Kim only gave [it] back after she got [pregnant] with Kanye’s baby and boasted during divorce proceedings, ‘Kris can have the ring back because Kanye is going to give me a flawless diamond engagement ring that makes my previous ring look like [a] Cracker Jack prize!”’