Chris, Yes, it's sharp! Would take a lot of grinding to not look like just a broken piece! And, Babs...maybe a garden piece is a good idea.
Nerd & Chris, thank you for all that explanation! I've never tried to use my kiln without just the built-in settings. It's an Excel with a Select Fire board. I set it for cone 5 (but when I use a witness cone it shows cone 6 was reached) and I usually choose slow or medium speed, but this time I used Fast...maybe that was the problem!!??
It looks like about 6 inches of the platter rested on the shelf. (No foot ring on this piece.)
I will o