What is "ratnangi"

Ratnangi (pronounced ratnāngi, meaning the one with a gem-like body) is a rāgam in Carnatic music (musical scale of South Indian classical music). It is the 2nd melakarta rāgam (parent scale) in the 72 melakarta rāgam system of Carnatic music. It is called Phenadhyuti in Muthuswami Dikshitar school of Carnatic music.