My everyday dishes, heck even when we have company over, are typically the red clay 'barro' dishes.
I even use cazuelas for a great deal of my cooking.
Cazuelas are barro pots
Now I know better, and I frequently advise others -
never put barro in the microwave.
But oh heck, it was just going to be a few seconds to defrost some frozen blueberries for my cereal.
This is why you don't put barro in the microwave.
Barro is porous, has air pockets, air pockets hold moisture, moisture expands and causes the air pockets to explode
Damn, my blueberries are ruined!