A German mineralogist, Mohs was a student of Werner and succeeded him at Freiberg University before moving to become professor of mineralogy in Vienna. In 1812, he developed a decimal scale for the hardness of minerals which is still in use. His Grundriss der Mineralogie (English edition called Outline of Mineralogy) was published in 1825. See mohs's scale of hardness.
Subjects: Earth Sciences and Geography.