Star Sapphire is the name of several supervillains in DC Comics, all connected in origin. Within DC continuity, an immortal race of warrior women (the Zamarons) were depicted as having the ancient tradition of choosing physically identical mortals from across the cosmos to serve as the host body for their queen. The woman they choose to serve this role is called Star Sapphire. She is given the queen's symbolic weapon; a crystal resembling an actual star sapphire that grants the user powers similar to the power ring of a Green Lantern.
In the 2000s the term came to refer to the Star Sapphires, a fictional organization whose members in part include women previously depicted as the singular Star Sapphire in DC titles. Not clearly defined as superheroes or supervillains, the Star Sapphires first debuted as a corps in Green Lantern vol. 4 #20 (July 2007). They were created by writer Geoff Johns and artist Ethan Van Sciver.