Edited by M.-C. Cauvin, A. Gourgaud, B. Gratuze, N. Arnaud, G. Poupeau, J.-L. Poidevin and C. Chataigner. Collection of papers concentrating on various aspects of obsidian, ranging from geology, petrology, various techniques of analysis, data handling, mathematical modelling, economic anthropology to text-aided ancient history. Maison de l'Orient Méditerranéen.