Where can I get a ring appraised at?

I have a ring I need to sell. The pawn shop wasn’t going to give me crap for it so I thought about selling it on Ebay and a friend recommended I get it appraised. First of all, is that really necessary? Secondly, does anyone know anywhere else I could sell it. I know I wont make all of the money back but I would like atleast more than what the pawn shop would give me.