Ok I went and watched flashback- I beleive it was Russell's rosary that he got when he was HOH.
It was at 10:20 pm on Cam 1.
The dresser closest to the pool room top draw, was given to Lydia. She found it and showed it to Chima, who said its doesnt' mean anything to him and decides to hide it! Lydia asks, "Wasn't it from Italy or something?" (which leads me to think it belongs to Russell.)
I hope Chima returns it- thats pretty low!