When I was out buying props for an anniversary party today, I came across a christmas card displayer that would work well for a jewellery display.
It is made out of wire, is very tall and looks like a cross between a christmas tree and the eiffel tower.
Here's a photo of something similar (the one I got does not have a star, and has a hinge to fold flat when not in use.)
http://www.ebay.co.uk/itm/Gold-coloured-metal-Christmas-card-holder-50cm-tall-/131532030923I also have a completely different display by Umbra that folds up like an accordian.
It has little clips at the top, duck bill clips instead of alligator (so no sharp teeth that could damage your cards, and easier for the customer to just pull the cards up and out, instead of having to unclip).
I got mine at a local bookstore for somewhere between $20-$30 a couple of years ago.
http://www.amazon.ca/Umbra-Crowd-Desktop-Photo-Display/dp/B00EV5CPOO- It is however very delicate, so you have to be careful as you pack it up, or you will end up bending the cables.
- I only use it for indoor shows, set high up on a shelf, near the back half of the table, so customers will not bump it.
I still prefer pinning into my boards, but postcard and photo displays made by umbra and other companies can work, and be visually interesting.