Examples from the Web for pyrolusite
Heated in an ignition tube yields water in abundance, otherwise it behaves like pyrolusite.The Elements of Blowpipe Analysis|Frederick Hutton Getman
Its dioxide (pyrolusite) has been known from very early times, and was at first mistaken for a magnetic oxide of iron.
As an ore of manganese it is much less abundant than pyrolusite or psilomelane.
Binoxide of manganese (Molecule, Mn.O2), is found native as pyrolusite or polyanite.British Manufacturing Industries|L. Arnoux
How does pyrolusite effect the decolorizing of glass containing iron?An Elementary Study of Chemistry|William McPherson