They're lovely Nbg,the only thing I would suggest is changing the colour of the background your taking the pictures on,either a white or black background would bring the colours of the stones out more.
I'm also a bit of a jewellery maker(am actually researching all the stuff to set up as a legitimate business) and whilst surfing found this article about pricing your designs
wire-sculpture.com/price.html
hope it helps and hope to see many more of your designs