The best way to get exposure is to have a website. Select some key words and get your site listed into search engines. There are threads in the E-commerce section of Cybershmooze, which will answer a lot of your questions about building web pages and making them visible. Have postcards printed at a print shop. You can easily photograph one of your special pieces on a fixture of mannequin or have someone model it for you. Put the image on your postcard along with your contact info and web address.

Also, you can go to shops, which sell clothing that will complement your jewelry and ask the owner or buyer if they'd like to carry some of your jewelry. Bring several pieces with you.

Lastly, photograph all pieces you make. That way if you sell a one-of-a-kind piece, you can show the photograph to potential buyers and post it on your webpage.
Good luck!:-)