Claddagh ring

"My people -- before I was changed -- they exchanged this as a sign of devotion. It's a claddagh ring. 

''The hands represent friendship, the crown represents loyalty... and the heart... Well, you know... Wear it with the heart pointing towards you. It means you belong to somebody. Like this. Put it on." - Angel ''

The Claddagh Ring was a birthday gift from Angel to Buffy in Surprise.

History
Is a traditional Irish ring given as a token of love or worn as a wedding ring. The design and customs associated with it originated in the Irish fishing village of Claddagh, located just outside the city of Galway. The ring was first produced in the 17th century during the reign of Queen Mary II, though elements of the design are much older.