Kris Humphries reportedly wants estranged wife Kim Kardashian to return the engagement ring he bought for her, as he "can't fathom" why she'd still want it.

The basketball star's marriage to the reality TV beauty lasted just 72 days, and Kris is said to be reeling following their split.

The 27-year-old is reportedly eager for Kim to return her 20 carat diamond engagement ring, as he doesn't know why she'd want it following their relationship breakdown.

"Kris wants the ring back because the marriage only lasted 72 days and he believes it was based on fraud and deceit. Remember, Kim filed for divorce. Kris paid for that ring, and he just can't fathom why Kim would want to keep it," a source told Radar Online.

"It's not like she is ever going to wear it again. Kris realises that with Kim it's all about material objects and she truly treasures things over people in her life."

Following her short-lived marriage, Kim has been spotted getting cosy with Kanye West. The two stars have been romantically linked many times in the past and it's now thought they are dating.