This accurately detailed raven skull is made of hot cast jewelers bronze. Like sterling, it can easily be maintained with any metal polish or allowed to slowly develop a patina if you so choose. This handsome fellow is completely three dimensional, the bottom has the detail of a real ravens skull including the internal bones, even in the eye sockets. Remarkably, this 2-1/4" skull only weighs a comfortable 33 grams because like a real skull, the brain case is hollow... and makes a great place to stash small items. The back of the skull is fitted with a bronze jump ring to accommodate the 24" oxidized brass flat link chain with matching lobster clasp.