X-Ray Fluorescence Spectrometry (XRF) in GeoarchaeologySince the 1960s, x ray fluorescence spectrometry (XRF), both wavelength and energy dispersive have served as the workhorse for non destructive and destructive analyses of archaeological materials. Recently eclipsed by other instrumentation such as LA ICP MS, XRF remains the mainstay of non destructive chemical analyses in archaeology, particularly for volcanic rocks, and most particularly for obsidian. In a world where heritage and repatriation issues