Roger Pabian

Roger Pabian is a highly respected agates specialist and paleontologist. He worked, at the University of Nebraska-Lincoln for 35 years teaching the geology of gemstones and now teaches gem-cutting. Brian Jackson is the Head of Mineralogy at the National Museums of Scotland. Peter Tandy is a curator mostrar más in the Department of Mineralogy at the Natural History Museum, London, England. John Cromartie is an expert on Scottish agates with 35 years' collecting experience. mostrar menos