I took apart an old 120MB disk drive to get the magnet.

I rather like the platters and want to keep them in my house. Maybe
to use as coffee mug mats or something like that.

But I don't want to rest my sandwiches on a platter while having a
coffee and then find that the platters have some toxic coating or can
be a hazard!

Can anyone tell me.

Also, I guess the magnet is made of a special alloy using rare
metals. Could it too be toxic or hazardous?