It really is hard to take pictures of yourself! I about screamed the last time I was photographing my veils.
I think it's good to show your necklace on a model, but your pictures are oddly tinted and look a little strange because of that. I'm not sure if that's because of the lighting, editing, or your camera settings, but I think it would be best if they looked as much like the other pictures as possible. Also, with modeling items, the focus should generally be on the item you're trying to sell. Wearing a bunch of other bracelets kind of takes the focus off of the necklace (though the bracelets are very cool too). I think that your third picture should be cropped to show just your upper body for the same reason. Good luck!
