As long as the ceramics have been fully glazed with a food-safe glaze and do not have any metallic decorations, they are most likely microwave safe. Generally, brand name/corporate made stuff will be fine, but handmade can be iffy because a lot of really pretty glazes are not food safe.
I quit doing this many many years ago. Glass only for me in microwaves.
Thoughts on microwaving ceramics? (Or even wood)
Hmmm no idea honestly?
As long as the ceramics have been fully glazed with a food-safe glaze and do not have any metallic decorations, they are most likely microwave safe. Generally, brand name/corporate made stuff will be fine, but handmade can be iffy because a lot of really pretty glazes are not food safe.