If it is wet stone, it is easier to crack when heated in the microwave oven, and drying is relatively safe. When we put the wet stone into the microwave oven and turn on the switch, the water in the stone will turn into steam due to heating, and then the volume will expand, which will put pressure on the stone from the inside and make it explode.

To be precise, if it is wet stone, it is easier to crack when heated in the microwave oven, and it is relatively safe to dry. Why is this? First of all, we should know that the principle of microwave heating objects is different from that of adding objects to cookware such as wok and steamer.

Pots generally heat food from the outside and slowly raise the temperature inside; Microwave makes the water molecules in the object rotate. When these molecules rotate and rub against each other, they generate heat, just as our hands get hot when we rub them quickly. At this time, the temperature inside the object rises first, and then outside.

When we put the wet stone into the microwave oven and turn on the switch, the water in the stone will turn into steam due to heating, and then the volume will expand, which will put pressure on the stone from the inside and make it explode. This is the same as when we cook an egg in a microwave oven, and we have to make a small hole in the egg, otherwise it will explode.