Originally Posted by
Mike Buckley
I've never lit diamonds, but my hunch is that your best lighting setup will involve at least two light sources though you may be able to get away with one light source and a white reflector. My reasoning is that there are so many small surfaces on the diamonds and that you want a lot of those surfaces to produce direct reflections (reflections of the light source). It's surely important that you keep shadows soft, so the way to do that is to place the light sources very close to the subject.