MindMatters: Stone from Wood Ash and Water Glass? Marcell Foti on His Latest GEOPOLYMER Experiments

Marcell Fóti returns to discuss his latest experiments on ancient stoneworking, including using heated alkalis and water glass to etch granite, form glossy coatings, room-temperature glass, and layered stone structures. He describes ongoing tests of these methods, including attempts to reproduce features in Egyptian granite, like quartz seams. He also shares a brand new database and mobile app for documenting stone objects and creating 3D models. (Marcell's book is available here.)...