Among those were the purple rings of the Star Sapphires, who represent love.

Several different colors of power rings were introduced to Green Lantern canon, including the Indigo rings of an empathy-driven Corps and the black rings of the death-themed Corps. The gimmick of Carol suddenly transforming into the misandrist Star Sapphire and going off on how inferior men are (while Hal clenched his jaw and thought 'not all men!') went on for years and years, but the whole story changed in the early 2000s. Having chosen the vessel of Hal Jordan's on-again-off-again girlfriend and boss Carol Ferris, Star Sapphire had too many conflicting feelings about Jordan to beat him in a fight, so their brawls usually just ended in her passing out and him winking knowingly at the reader. Appointed queen by the matriarchal alien society of the alien planet Zamaron, Star Sapphire strove to prove that men were inferior by attempting to best a certain superhero. Outside of Sinestro, Star Sapphire has been Green Lantern's most recognizable villain since her debut in 1962's Green Lantern #16.

Star sapphires