(1) Square with two rounded corners, three sheets acrylic jointed together with silver pins, the middle layer with an arrangement of ivory segments and titanium bars.
(2) Square with two diagonal rounded corners, three sheets acrylic jointed together with silver pins, the middle layer with an arrangement of ivory segments and titanium bars.
(3) Square with one rounded corner, three sheets acrylic jointed together with silver pins, the middle layer with an arrangement of ivory segments and titanium bars.