so no real creative image concept to interest or speak to me, except the intended pun in the title. Try using desk lamps rather than the onboard flash to light this "product shot" style image, the lighting will really help give the shot some impact if you blow out the background and light the subject from the sides. Centre placement also doesnt do this image any favours, nor does the fact that the "Jewels" arent really given as much pride of place that the title suggests.
Just trying to help you with my thoughts on why i scored this low.
Cute idea and punny title. The lighting is a little awkward to me, because I can't tell whether you wanted the shadow or not. I think I would angle the light so the shadow fell on more of a diagonal if I wanted to keep it, or use fill flash from the side if I wanted to make it go away.