Orichalcum
The chemical analysis of the ingots found in the 2015 shipwreck revealed orichalcum is high quality brass. Brass is an alloy of copper and zinc, and while the ancient Greeks did not know metallic zinc, they knew zinc-containing ores, and the description that orichalcum has similar colour and shine as gold, fits well to the properties of brass. While brass is not exactly a precious metal, it does not corrode and it is widely used on jewelry, marine instruments and medical instruments. Goldsmiths and jewellers describe brass as "mahogany of metals".