Prospecting for materials

One of the intriguing aspects of firing to cone 10 (around 2300F or 1200C) is that many materials which are stable at ambient temperatures will metamorphose and fuse into ceramic materials at my firing temperature. Trying to answer the perennial question of “What will this stuff do in my firing?” has intrigued me since I started my clay journey. Admittedly,¬† most results are more informative than aesthetically pleasing, but sometimes, as with my volcanic ash celadon, the payoff is rich¬† enough to keep me at it.