Hi,
Your shop hasn't been open very long, so don't freak out about not having a sale! : )
Your shop banner is very nice, I like it a lot, and your photography is good (not amazing, but good!) and simple. Your prices also seem reasonable.
One thing you could do is clarify the materials being used - I noticed you said "silver chain" for some listings, but I don't know if that means silver tone or genuine silver. I would probably message you to ask before making a purchase, so that could be stopping some people from buying your items.
Also, the more listings you have, the more people will view your shop - they might not buy the listing that brought them to your shop, but if you have a lot of listings, they may buy something else! So I would think that a way to get a sale would be to concentrate on adding more jewelry to your store. : )
Good luck!
- Julia Z