Robert is a specialised mineralogist by training, having worked on metal ores. He graduated from Manchester University with a BSc (Hons) in geology with subsid. in Northwest European Prehistory. He stayed at Manchester for his PhD on "controls on mineralisation in Derbyshire".
He taught mineralogy/petrography for decades at Aston University, then at Birmingham and Leicester universities, but retired in 2000. He is now an honorary senior research fellow in the Institute of Archaeology at UCL and a Fellow of the Society of Antiquaries of London.
His interests were in the mineralogy of gold, silver and the platinum group metals but also in the mineralogy of palaeomagnetism and in Inka, Killke and Chimu ceramics. He enjoyed consulting for the major mining houses including visits to Namibia and South Africa but now mainly consults for archaeologists.