Carlo Perrier (born July 7, 1886, in Turin, † May 22, 1948 in Genoa ) was an Italian mineralogist and chemist who did extensive research on the element technetium.
From 1911 to 1912 he worked at the Laboratory for Physical Chemistry and Electrochemistry at ETH Zurich with Baur and Treadwell.
He was Zambonini's assistant in Turin and, after a competition, became director of the State Geochemical Laboratory in Rome in 1921.
Segrè and Perrier found technetium in a sample of molybdenum that had been bombarded with deuterons in the Berkeley cyclotron.
The mineral perrierite ( perrierite (Ce) ) is named in his honor, a black to dark brown monoclinic group silicate with cerium, iron and titanium, which is a rare component of the Neptune sand in Rome.