Hi Tribune and welcome to the Q&A Board!
Can you please give us an idea of about how much you'd like to spend? It will help us lead you in the right direction. You'll probably need a tripod or mini tripod as well.
Don't mean to toot my own horn, but I recently completed writing an ebook about how to photograph products. It contains a lot of ideas about photographing small items such a jewerly without fancy studio equipment.
http://www.digicamhelp.com/book-information/index.htmAlso have some general tips here:
http://www.digicamhelp.com/auction-photography/index.htm