Wonderful idea! You could have put a few more reflectors around the jewelry (not to light them more, but to create more catch lights in the stones) to make this even better.
This is my favorite picture in this challenge. I hope it does really well.
The shadow and the feather make this "product" very interesting and set its apart from your competitors without turning it into a commercial like some of the images in this challenge
Like this photo, I think I would have liked it a bit more sharpness on the front flowers. I also like the shadow of the bird, it gives a touch of softness to the picture.