New archaeological research is reshaping the timeline of early metallurgy in Europe. A team led by Dr. Ralph Araque Gonzalez at the University of Freiburg argues that communities in Iberia may have been using hardened steel tools nearly 2,900 years ago, during the Final Bronze Age.
What the stone monuments reveal
The study focused on Iberian stelae, upright stone monuments carved with human figures, animals, weapons, and chariots. Because archaeological remains from western Iberia are limited, these stones offer rare insight into the region's Bronze Age craftsmanship.
Geochemical analysis showed that several of the monuments were made from silicate quartz sandstone rather than quartzite, as previously believed. That matters because this harder material would have required a much more advanced cutting edge to shape it effectively.
To test the idea, researchers compared carving results using stone, bronze, iron, and steel chisels. Only the hardened steel tool was able to engrave the rock with the needed precision. A chisel found at Rocha do Vigio in Portugal, dating to the same broad period, added further support to the hypothesis.
A more local story of innovation
Follow-up work used 3D scans and digital models to study the grooves left in the stone. The marks matched sharp-edged tools used with indirect blows, while bronze and softer iron tools proved too weak for the task. The evidence points to a sophisticated craft tradition rather than a technology imported much later through large empires.
Researchers describe the tool as bloomery steel, an early handmade form of iron with a deliberately hardened edge. That suggests Bronze Age metalworkers in western Iberia may have developed practical steelworking skills through experimentation, heating, hammering, and controlled cooling.
The findings, published in the Journal of Archaeological Science, invite a fresh look at how early Europeans mastered metal. If confirmed more broadly, this discovery could help redraw the map of ancient innovation and show that advanced material science emerged in local communities far earlier than once thought.