X-Ray fluorescence spectrometry in twenty-first century archaeology / M. Steven Shackley -- An introduction to X-Ray fluorescence (XRF) analysis in archaeology / M. Steven Shackley -- Factors affecting the energy-dispersive X-Ray fluorescence (EDXRF) analysis of archaeological obsidian / M. Kathleen Davis, Thomas L. Jackson, M. Steven Shackley, Timothy Teague, Joachim H. Hampel -- Non-destructive EDXRF analyses of archaeological basalts / Steven P. Lundblad, Peter R. Mills, Arian Drake-Raue, Scott Kekuewa Kikiloi -- Non-destructive applications of wavelength XRF in obsidian studies / Annamaria De Francesco, M. Bocci, G.M. Crisci -- Portable XRF of archaeological artifacts : current research, potentials and limitations / Ioannis Liritzis, Nikolaos Zacharias -- Elemental analysis of fine-grained basalt sources from the Samoan island of Tutuila : applications of energy dispersive X-Ray Fluorescence (EDXRF) and instrumental neutron activation analysis (INAA) toward an intra-island provenance study / Phillip R. Johnson -- Comparison and contrast between XRF and NAA : used for characterization of obsidian sources in central Mexico / Michael D. Glascock -- Is there a future for XRF in twenty-first century archaeology? / Rosemary A. Joyce