I looked at your shop. I have several suggestions. I do not think the prices are to high for the necklaces, but maybe a bit high on the cards. You'll have to decide if the time you put into the cards warrants the price, if so leave it as is.
Your photos are dark and include shadows. I learned awhile back to use a light box when taking photos. There is an article in the Etsy help. Or do a search on light box. I think that will solve your photographic issue.
You do not have much to say in your shop description, nor have you created an 'About' page. But the biggest missing page for your shop is the 'Policy' page. This is where you can explain about how long it will take to ship. What payments you accept. How you will handle returns. I think you could be a bit more descriptive about your self so the buyer can get a feel for the artist they are buying from. I hope this helps you.
Would you please take a look at my shop and return the favor by giving me a critique? You can send me a message from my shops page. Thanks, Martha