1. A colourful past: assessing motivations for the acquisition of turquoise in the ancient U.S. Southwest, Saul Hedquist; Lewis Borck and Alyson Thibodeau 2. The Manufacturing traces of the turquoise objects and the lapidary technology from Chaco Canyon: an experimental archaeology approach, Emiliano Melgar 3. The presence and potential representation of turquoise at the Mimbres site of Galaz, Will Russell, Sarah Klassen, and Katherine Salazar 4. Blue-green Stone Mosaics in the US Southwest and Northwestern Mexico: Origins, Spatiotemporal Distribution and Potential Meanings, Lindsay Shepard, Christopher Schwartz, Will Russell, Robert Weiner and Ben Nelson 5. The green stone as a motif for the colonization of the Cañón de Bolaños (Western Mexico), Teresa Cabrero 6.

Green stones in the centre of Jalisco (Mexico), Lorenza López 7. The variscite of Gavà (Spain). Characterisation and system of exploitation and diffusion in the North-East of the Iberian Peninsula, Miquel Molist, Josep Bosch, Anna Gómez, Silvia Calvo and Mònica Borrell 8. From the green belt: an appraisal on the circulation of Western Iberian variscite, Carlos Rodríguez-Rellán, Ramón Fábregas Valcarce and António Faustino Carvalho 9. Long distance provenances of jewellery (variscite & turquoise) along Atlantic Europe during Neolithic (5th-3rd millennium) based on PIXE analysis, Guirec Querré, Thomas Calligaro, Serge Cassen and Salvador Domínguez-Bella 10. Green treasures from the magic mountains: the use of jadeitite and other Alpine rocks in Neolithic Europe, Alison Sherida, Pierre Pétrequin) and Michel Errera 11. Spaces and signs of transfer of Jade and Calläis in the Neolithic of Western Europe, Serge Cassen, Pierre Pétrequin, Guirec Querré and Valentin Grimaud.