Help - can I put ironstone plates in a microwave?

edda

My neighbours have never used a microwave before.
They have some plates which are marked as 'ironstone'.
Can these be safely used in a microwave?

I would guess these plates are at least 20 (maybe even 30) years old.
Anyone got a clue what they are made of and if they contain any metal?

I've seen newer stuff that is safe - but I think these plates were bought before microwaves were widely used.

Thanks for any replies.

welsh_worrier

I thought "Ironstone " was the pattern or style or manufacturer.Probably wrong tho.

djohn2002uk

What is ironstone?
Ironstone is earthenware that is fired to a high temperature which makes is harder and more durable. Burleigh products are fired to 1160°C - 2120° F

And

Are Burleigh products oven proof?
All Burleigh products are made from English earthenware, and are dishwasher proof and microwave safe.

Both are from the Burleigh website.