Your jewellery is really lovely and I have banner envy - what a great logo! It really reflects your style.
I would agree with the other comments about brightening up your photos - have you tried making a lightbox? I've not tried it myself, but there are lots of threads here with advice on how to do it yourself. The seller's handbook has some really good tips on photography too.
I also think it's equally important to look at your titles, tags and descriptions too. I was advised that the first three words in your title are most important, so for your necklace below (gorgeous btw) I would suggest: "Silver wire-wrapped pendant: Dainty wire wrapped green circle pendant on a beautiful silver chain" And then add all of the key descriptive words into your tags as well. I find it really helpful to do a search for similar items to my own before I list a new item to see how others will find my jewellery.
More detailed descriptions would help buyers make a decision too - are those beads glass, crystal, or a semi-precious stone? Do you use sterling silver, or is it silver plated? How long is the chain? Are your items gift wrapped?
http://www.etsy.com/listing/91725201/dainty-wire-wrapped-green-circle-pendantHope that helps a little - good luck!