gems, history of gemology, history of mineralogy, Arabic mineralogy, history of science, Greek science, astronomy

Through the increased use of Carbon-14 dating in West African archaeology, it is now widely accepted that iron was known to the ancient Nok peoples of present-day Ghana and Nigeria during the pre-Christian era. The Nok Culture" was first identified in 1959 by Bernard Fagg following excavations at the Nok Site in central Nigeria, and stratigraphic analysis placed the culture in the centuries surrounding the birth of Christ. Iron was discovered at the site, and Fagg’s announcement of its unexpectedly early use in West Africa came as a revelation to prehistorians. Before this discovery, the prevailing view was that iron had been introduced relatively late, either through Islamic influence or contact with the Portuguese after 1400. However, subsequent fieldwork revealed furnace remains alongside Nok artifacts, confirming that iron was being smelted locally more than 1,500 years before Portuguese arrival. Remarkably, iron and slag appeared suddenly amid Stone Age remains, unlike the gradual technological progression seen in the Near East. This discontinuity suggests that iron technology was not an indigenous invention in West Africa but rather a product of external influence, likely diffused from the Fertile Crescent. The precise route by which iron-making knowledge reached West Africa, however, remains a subject of ongoing scholarly debate."