First off, I LOVE your banner! Simple and stylish.
The inventory you have is really great, 174 items! Really great accomplishment.
I'd recommend not using the border on your listings. It decreases your chances of being on the front page, and in treasuries. It also is a distraction. The focus should be on the item. You might want to show the jewelry on a model too and utilize more photos.
Some of your listings like this one -
http://www.etsy.com/listing/103258044/vintage-button-ring-gray-grey-metal have a very choppy description. I'd recommend using full sentences. You also write the button is 1/2" -include it in cm too (I saw you did this for necklaces, so I'd keep it consistent for international sellers).
You might want to create an About page too. I think it's great for buyers to see and am working on creating mine :)