On most Pyrex cookware it states to not put it directly on a stove top however some Pyrex such as Pyrex Coffee pots can be heated on the stove top.
But other Pyrex Cookware may crack or break when used directly on stove top burners.
Pyrex Cookware is mostly used in Ovens and although you may try to put some Pyrex cookware on the stove it's not recommended as it could break.
My Pyrex says not to put it on the stove top so I don't do it because I don't want to risk breaking it.