The ring is set with a hexagonal sapphire in a bezel with two side bands engraved with flowers and leaves and a plain central band that has worn smooth in places.
Inside the hoop is the French inscription Joye Sanz Fyn which can be translated as Joy Without End’.
A similar ring owned by former Archbishop of Canterbury, William Wytlesey, who died in 1374, can be seen in a collection at the Victoria and Albert Museum in London.
I don’t know how unusual it is to find a ring with a French inscription as opposed to a Latin. Also, the phrases sounds a bit strange and sort of secular.