A 9/11 widow has upped the reward for the return of her stolen wedding rings to $10,500.

Monica Iken had used diamonds from her wedding ring with husband Michael, a bond trader killed on 9/11, to fashion a new ring with her current husband, FDNY firefighter Robert Murphy.

The $22,000 bands vanished from a nightstand in a Hamptons home she visited Aug. 13. Police consider them stolen.

Since Iken first offered a $500 reward in The Post, two donors have pitched in $5,000 each to increase the amount.

One is Howard Coupland, a rescue diver, videographer and board member of Iken’s September’s Mission foundation, which promotes disaster relief.

The other is a sympathetic stranger.

“I think people understand the meaning behind something that’s priceless,” Iken said.

“It’s two souls connected into one,” she said of her two husbands.

The city never recovered any of Michael’s remains or personal items, including his own gold wedding ring.

“These were my remains,” she said of the missing rings.

“I was hoping to give the diamonds to my two daughters, for their future,” she added.

Iken asks anyone with information about the rings’ whereabouts to contact Ray at (347) 742-043