This design can be worn either as a brooch or as a pendant depending on your mood and outfit. It is brass and sterling silver. With a hand sawn castellated bezel surrounded the opal stone. The is a tube set 3mm facted peridot stone on the front that picks up some of the green color in the opal. the back also has a tube set 3mm faceted peridot stone that locks the pin in place. The hand fabricated chain is 19" in length. The piece is just over 2 inches high x 1 and one eighth inces wide. This is my first brooch/pendant combo.