geochemical analysis

Tracing Mexica obsidian

Obsidian was highly valued by many cultures across Pre-Columbian Mesoamerica, including the Mexica (Aztecs), for its natural lustre and sharpness, which made it a perfect material for both highly polished ornaments and the production of tools. Analysis of obsidian artefacts…

Lapis Lazuli, The Blue Road: Seeking the sources of the longest trade

Establishing the origin of the lapis lazuli used in ancient artefacts has long been beyond the reach of science. Now an innovative technique has revealed, in a non-invasive way, where the precious stone was coming from. Alessandro Lo Giudice, Alessandro Re, Laura Guidorzi, Marta Magalini, Norman Hammond, Randall Law, Guy Clutterbuck, and Georgina Herrmann guide us from a laboratory in Italy to a remote mine.

Armenia’s earliest church

Excavations in the ancient city of Artaxata have uncovered the remains of a church dating to the early days of Christianity in Armenia. Artaxata was the capital of the Kingdom of Armenia from the early 2nd century BC, and remained…

Stone tool in Volubilis

Roman tools from Volubilis

A study of stone tools from the Roman site of Volubilis in central Morocco has revealed that the material used to make them was specifically selected to improve the function of each object.

Sorting Samian using pXRF

In this month’s ‘Science Notes’ we explore recent research by Richard Jones and Louisa Campbell, whose aim was to assess whether portable X-ray fluorescence (pXRF) analysis can offer a quick and affordable way to categorise previously unidentifiable examples of Samian ware.