Sixteen papers discuss the significance of early trade and exchange in obsidian in the Near and Middle East, new advances in methodology and in the identification of sources that are making such research possible. Includes papers on geology, methods of characterisation, dating, provenance studies of obsidian artefacts, and studies of the nature and distribution of artefacts.Sixteen papers discuss the significance of early trade and exchange in obsidian in the Near and Middle East, new advances in methodology and in the identification of sources that are making such research possible.