Taken in our bathroom, incandescent light, with my Olympus C-5000 and using white posterboard to shield the rings from the harshness of the lightbulbs -to bounce the light a little bit in order to eliminate/reduce hot spots.
BTW: We got them from Bruce Boone at http://www.boonerings.com -thanks Bruce! They're beautiful!
If you're wondering about the pattern on them, it's called "Mokume" -it's a Japanese art form where metals (in this case: white, yellow, and rose gold) are folded together to form a pattern that looks like wood grain.