My most cherished piece of jewelry is my wedding ring.
It’s a wide, gold band and I’ve worn it for decades now. I like the symbolism of a band, without jewels, because (to me at least) it signifies my love unbroken love for my wonderful husband.
The Papal Ring is a powerful symbol of love, also. It signifies the love and leadership of Christ in our lives, reflected in the person of the pope.
This video gives a few details about papal rings. It’s also humorous, coming as it does from the days immediately before Pope Francis was elected.