In the Snake Bracelet of Cleopatra, The first orb she grabs looks like a square. The second one the she uses to open the door is probably a triangle, because when she lifts it you can the bottom, and it looks like a triangle. And when shes putting it in, she's turning it one third each time she turns it.
And you can see that the base of the orb in the front is circular, based on how the light is shining on it.