You're jewelry's cute and seems to be reasonably priced. You may reword your banner ad to include a product description for better SEO. And then promote, promote, promote. Facebook, twitter, flickr, tumbler, stubledupon, squidoo....as many as you can make time for daily. Don't be afraid to plug your items (without spamming) in any chat rooms, forums, and blogs you belong to. Setting up Google Analytics will tell you where you get the most traffic from and help you decide where and when to focus your markeing efforts after a couple of weeks.
You have to be a little bit shameless (but legal) about this. I see internet marketing like the new version of the paper flyer. You want to drive people to your site, but you may only get a 1-5% response, which means you need to really put yourself out there. Especially with the ultra-competitive jewelry market. Good luck.