Oh! Thanks for that link. I just bought some cards I can bend and manipulate like them.
This was the first time I shot on black, and on glass.
It's really the first time, I think, that I got the diamonds to really look alive.
I don't mind the dark reflection here, and think it really set off that top ring of stones and the center stone. The customer delayed pick up, so I have time for a reshoot, and I'll see what I can do with more reflectors.