Speculation has risen that Tolkein himself was inspired by one ring,
and the ring is linked to an ancient curse and mystery. A ring believed to be found by a farmer ploughing a field in Silchester in 1785. The 12 gram gold ring is so large that it fits on a gloved thumb and is inscribed with the words, "Senicianus live well in God".
And then, 100 miles away, a tablet is found some decades later, inscribed, "Among those who bear the name of Senicianus to none grant health until he bring back the ring to the temple of Nodens."
Curious, eh? The whole story is here: