Eponymous mineralogist Friedrich Crossword Clue

 The eponymuous mineralogist Friedrich referred to in the crossword clue is Mohs.

Friedrich Mohs was a German mineralogist who developed the Mohs scale of mineral hardness in 1812. The Mohs scale is a qualitative scale that ranks minerals based on their relative hardness. The scale is numbered from 1 to 10, with 1 being the softest mineral and 10 being the hardest.

Mohs was born in Gernrode, Germany, in 1773. He studied mineralogy and geology at the University of Göttingen. After graduating, he worked as a mineralogist for the Prussian government. He retired from the government in 1826 and devoted his time to research and writing.

Mohs published several books on mineralogy, including "The Elements of Mineralogy" (1822) and "Treatise on Mineralogy" (1825). He also invented a number of instruments for studying minerals, including the Mohs hardness scale.

Mohs died in Berlin, Germany, in 1839. He is considered one of the most important mineralogists of the 19th century.

Here are some other possible answers to the crossword clue "Eponymous mineralogist Friedrich":

Strunz

Reuss

Werner

Haidinger

Becke

The best answer will depend on the specific context of the crossword puzzle.