Experimenting with photography

I'm trying to figure out the best ways to photograph my jewellery. Obviously I realize this will change according to the subject matter, but I've been doing a little experimentation with different lighting and atmospheres. I by no means consider myself a photographer of any sort! but have considerably enjoyed this process 8) .... I am, however, struggling to decide on which ones work best, so I thought I'd ask everyone who views this post to give me some feedback on the pictures and what they think. Constructive criticism is very welcome and any suggestions would be great!