Walker, K. (Ed.), 2018c. Stonechat: The e-Newsletter of the Implement Petrology Group: Volume 7, pp 8. CONTENTS EditorialMessage from the Chair of IPG, Alison SheridanNorwegian Ragstone, Rob IxerThe IPG represented at UISPP World Congress, Paris, Katharine WalkerThe Obsidian Museum of Japan, Pete Topping3D modelling of carved stone balls by National Museums Scotland’s Hugo Anderson-WhymarkNew publications DOWNLOAD PDF Available here.