oh no I am so sorry - I have gotten robbed and it is the worst feeling in the world - I know how violated you feel.
Go check out all the pawn shops around there. If you have a picture I would send it to each of them. that is usually where they bring jewelry...the cops didn't do S*it for me when I got robbed so the best bet is to try and find it yourself.
Good luck - once again I'm so sorry you have to go through this but I am so glad you guys are safe since that is what matters most.