Harkening back to Neolithic times, it is another symbol of the triad.
Celtic La Tène Brooch
Each item begins as a piece of sheet metal, copper, bronze, brass or nickel. The pattern was transferred to the metal with a rolling mill from an original piece I etched in a salt-water solution. The piece is hand cut, sanded, and polished. A patina, clear polymer coating applied and a pin attached to the back with adhesive.