|2,600-year-old shipwreck found|
off the coast of Sicily. Source.
We have seen orichalcum from ancient texts and a few ornamental objects.
According to Wikipedia orichalcum or aurichalcum is a metal mentioned in several ancient writings, including a story of Atlantis in the Critias dialogue, recorded by Plato. According to Critias, orichalcum was considered second only to gold in value.