How was Manganese Discovered?

Manganese was discovered because of the manufacture of glass. In the 1700’s pyrolusite which is primarily made up of manganese dioxide had been used for quite a while to make glass clear. Because of this, it was long thought that pyrolusite contained a ‘new’ mineral’. However, efforts to isolate it proved difficult. In 1774 the Swedish mineralogist Johann Gottleib Gahn was the first person to successfully isolate and identify it. For more information, look here: