(CNN) Monica Iken-Murphy wanted her husband, who was killed on September 11, to always be part of her life. So she used the diamonds from her wedding ring to create a new one when she remarried.

Now, she is pleading for the return of her ring and two diamond bands that disappeared last month after she left them on night stand in a home a co-worker rented in Westhampton, New York. Iken-Murphy said she reported the rings missing to Southampton police, who are investigating them as stolen.

"I just need my rings," Iken-Murphy told HLN's Lynn Smith on Wednesday. "It's not about money for me. It's about how meaningful they are, and what significance they have."

There is a reward of $10,500 for the return of the rings, Iken said. Most of the money comes from two donors, including a board member of September's Mission, the nonproft Iken founded in 2002 that seeks to preserve the legacy of the terrorist attacks victims, including first responders who have died from 9/11-related illnesses and those who continue to suffer.

MISSING WEDDING RING with 2 diamond bands #WESTHAMPTON LAST SEEN 8/12/19

I DESIGNED IT SO IT IS ONE OF A KIND pic.twitter.com/pGbFGaz8ja — monica iken (@monicareedman) August 17, 2019

Iken-Murphy met her late husband Michael Iken on Sept. 11 1999. They were married for 11 months when Iken, who worked as bond trader at Euro Brokers on the 84th floor of the World Trade Center's South Tower, died in the terrorist attack. He was 37.

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