re: I'll ask this on this board: LOTR, Saruman

Gandalf tells Bilbo that there are many magical rings in Middle Earth, and none are to be trifled with. If Saruman is a ring maker, then he can’t be wearing one of the three, seven, or nine. (Because we know where all the 9 are, the 3 are hidden but kept, and I doubt Saruman would describe himself as a ring MAKER and yet still be wearing one of the lost 7 of the Dwarves)

He must’ve been a bit bent out of shape when Gandalf was entrusted with Narya, the ring of fire.

But it is an interesting theory.