This photo meets the challenge but it seems rather boring to look at. The light is actually drawing my eye away from your subject rather than bringing me to it. You didn't include any of your own thoughts, so I can't offer you much more than that...
I like the lighting, and the shadow it creates, but i think it would be stronger with a Jewel that was not in a setting.
I was thinking that perhaps the jewel was a bright color, maybe topaz or something, then it would be more interesting as well, because the light refracted behind it would also be blue and would contrast nicely with the light colored paper. 6
Love the texture of the background, and the central point of focus seems to be perfectly aligned in the rule of thirds grid. However, it's hard for me to tell what the item is. The title indicates that it's a jewel, but is it a jewel in some sort of setting? A ring? A bit better lighting on the item would have helped me.
Meets the challenge. I would have liked to have seen a little crisper picture of the jewell or perhaps more definition to see the stone (reflections ect).