Able to withstand temperatures as high as 500 degrees Fahrenheit, stoneware is extremely versatile and can be used in ovens, convection ovens and microwaves. Stoneware can also be used to store food in refrigerators and freezers. There are, however, some applications for which stoneware is not intended, and using stoneware for these tasks may result in cracks or breakage.
Stoneware should never be used on the stovetop or in any manner that puts it in direct contact with the heat source. Do not use stoneware to broil unless the manufacturer states that you can do so and don't take stoneware directly from the refrigerator or freezer to the oven and vice versa. Instead, allow stoneware to cool or warm slowly as it may break if quickly taken from one temperature extreme to the other.
There is a type of stoneware known as "flameware" that can be used directly on the stovetop. Flameware is made from clays that have different properties then the clay used to make traditional stoneware, making the finished cookware better able to withstand direct heat and thermal shock. Flameware can also be used in a hot preheated oven as well as to broil food.