Lock ring
From Wikipedia, the free encyclopedia
A lock ring is the name given by archaeologists to a type of jewellery from Bronze Age Europe.
They are made from gold or bronze and are penannular, providing a slot that is thought to have been used for attaching them as earrings or as hair ornaments. Ireland was a centre of production in the British Isles though rings were made and used across the continent, notably by the Unetice culture of central Europe.