Turning Tiles into pebbles
Place the glass tiles apart so they do not touch about 25 to 30cm in a kiln.
Heat the kiln slowly to 540°C and hold for 15 minutes.
Raise the heat to a full fuse temperature of 790°C and hold for 10 to 30 minutes until the edges round into pebbles.
Cool the kiln to 960°F (515°C), hold for one hour to anneal the glass, then let it cool down to room temperature