Symmetry
For symmetry I decided to play with the effects of water on perception. I tried with different bowls and glasses and then different objects and angles.
The lighting setup was a simple one light flat lighting with a soft box.
Here are some examples of the objects I tried to use:
But the best in my opinion was the earring. Only on the 19th time I managed to get the one I ended up using, which was the closest to a perfect symmetry.