[Gorthaur the Cruel]

It's been a while since I've read the books so I wouldn't be able to find it but I'm pretty sure it exist. I wouldn't make it up. Saruman has long studied the lore of the ring-making of Sauron. He was also envious of Gandalf for instead of him, Gandalf was entrusted the guardianship of Narya, the ring of fire. Saruman is also a maia of Aule, so this wouldn't come as a surprise to me. With his own version of a home-made ring, he was able to muster an army of Urukhai, orcs who can travel at great speed & are not hindered by day light, not like your ordinary morgoth orcs. But then again, I cannot supply with a quote so you believe it or not, though I highly doubt Saurman's ring is nothing more than an ornament.