Before you buy a bowl, always check it’s integrity by flicking a finger against the side of the bowl.  You should hear a lovely “Ping!”  The ping tells you that there are no cracks in the bowl.

 

Stoneware is safe to use in conventional ovens, convection ovens, microwave ovens, and is freezer-safe and dishwasher safe.   Stoneware needs to come to room temperature before you take it from the freezer to the oven, otherwise there is danger of cracking.