Hy there, this is not a necklace its a shaplest, its more used by arabes yes....it looks nice shaplest my freind, and good idea to hv the shoot...keep going...wish you luck..
Don't shoot me if I'm being too harsh ;) I think the upper area which is out of focus, is too large. The necklace (it is probably not a necklace but my english is bad) leads the eye right out of the frame. Try to position it higher and have it turn around instead of leaving the frame at a corner. I think that may give a more pleasing image. I understand, however, that when you're lying in bed, you may not worry about these things :)
0 
