Hi there,
First of all a few weeks is not much time to be fretting about, for some of us it took months before our first sale.
Jewelry is also very competitive, so you need to make sure you have good photos etc. That said, keep at it.
I would highly recommend redoing your photos. Most are dark and blurry. Take a look at some of your competitors that do well, and see how they photography their items. Some of it you can take care of in editing, brightening and contrast but you need to start off with a good photo. Try using your macro setting.
Good luck and keep promoting,
Best,
j