I would agree with all of Gregs comments above Bob. I would also suggest you give some thought to your colour theory if you are planning on using colour in your design. The colours used at the moment are quite cold, icey almost and dont really say jewelery to me. Have a look around at existing jewellers and see how they use colours that reflects the luxurious nature of their products (golds,silvers,deep purples and deep reds for example)
And dont forget the basics; how will this look printed at a very small scale when on a business card? How would it look in black and white if photocopied? Can someone tell from a first glance what the name says and what kind of business the company is?
Hope that helps!