🇬🇷 Greece · Ancient technology
Orichalcum – Atlantean Red Metal (Hypothetical Metallurgy)
Plato 360 BCE description; metal 8th–5th c. BCE brass production · Greek (Platonic) + Sicilian Greek brass workers
Plato's orichalcum second-to-gold — 2015 Gela wreck 40 brass ingots proved high-zinc cementation brass, not superconductor.