Thanks. This last time I did have 2 in there at the same time. I did try and keep them separate. Perhaps they were too close and that is what caused those to crack; however, I usually do one at a time. I can try to heat up my tool some prior to placing the marble, though. Thanks.
With the Japanese annealing beads is the process similar to what I am currently doing with the crock pot and vermiculite?
My goal isn't proper annealing. I just want them to cool without breaking so I can see what they look like cold and find imperfections in them that I can learn from. I am not selling any of the things I make. I am just trying to learn and have fun. It's just discouraging/sad when they break.