The Vyne Ring or the Ring of Silvianus and JRRT

The Ring_of_Silvianus is a peculiar thing.

https://en.wikipedia.org/wiki/Ring_of_Silvianus#Association_with_Tolkien

https://middle-earth.xenite.org/was-tolkiens-one-ring-inspired-by-the-cursed-ring-of-silvianus/

https://gizmodo.com/behold-the-cursed-ring-that-may-have-inspired-tolkiens-470953971

https://www.ripleys.com/weird-news/one-ring-to-curse-them-all/

https://geektyrant.com/news/the-norse-myth-of-the-cursed-ring-that-inspired-the-lord-of-the-rings

https://en.wikipedia.org/wiki/J._R._R._Tolkien's_influences#Nodens

https://middle-earth.xenite.org/why-did-elwing-give-the-ring-of-barahir-to-elros-and-not-to-elrond-the-older-brother/

https://middle-earth.xenite.org/palantiri-emyn-beraid-avallone-used/

https://thedigitallabyrinth.blogspot.com/search?q=The+Rings+of+Power