Oman's Ancient Copper Industry Stands as Testament to Advanced Civilization A’Rustaq, 12 Oct (ONA) --- The ancient copper industry in the Sultanate of Oman serves as compelling evidence of an advanced civilization that evolved into a leading industrial power nearly five thousand years ago. Historical records from Sumerian and Assyrian civilizations document copper exports from Oman to Mesopotamia, while numerous archaeological sites across the country reveal extensive smelting remnants that testify to the industry's remarkable scale ...