Yoomurjak's Ring was created in 2006-10.
Loki stole Andvari's magical ring.
His Akatsuki ring bears the kanji for Vermilion (朱,shu).
It looks like Jim Ward invented circa 1975.
The heraldic charge in the shape of a small ring is an annulet.
The signet was a stamp which was used to impress a picture into wax used to seal a document. It was convenient to have this signet made into a ring.
Get in the Ring was created in 1991.
With This Ring was created in 1951.
The Linking Ring was created in 1923.
Ring a Ring o' Roses was created in 1881.
Give Her a Ring was created in 1934.
The Promise Ring was created in 1995.
Magical Ring was created in 1983.
The Primrose Ring was created in 1915.
The Iron Ring was created in 1997.
The Shield Ring was created in 1956.
The Sherwood Ring was created in 1958.
Angle Ring was created in 1951.