Created by the Zamarons to collect the various emotions of emotional energy spectrum and to spread and protect love throughout the universe in order to promote order and revenge against males.
Carol Ferris reveals to Hal Jordan that during the most recent time the gem possessed her, she gained knowledge of the Star Sapphire: they come from Sector 1416 and comprise a corps known as the Star Sapphires whose purpose is to spread love throughout all 3600 sectors of the universe. The leaders of the Corps are Oans who, after migrating to Zamaron, found a parasitic crystal which they shaped into several Star Sapphires. These were used to empower females who had been loved and spurned, providing them the opportunity for revenge.
In the afterlude of this incident, the Zamarons are shown converting the Star Sapphire (which Hal Jordan had tricked into latching onto one of the Zamarons) into a power ring and lantern, which they place on a dais which contains a ring and lantern set of the Green Lantern Corps and the Sinestro Corps, alongside several ring/lantern sets of different colors mentioning that they must collect all emotions in order to combat "the Prophecy".
After realizing the power of the Star Sapphire was too great for them to control, the Zamarons forged a Violet Power Battery and power ring out of the Star Sapphire (Gem). Violet power rings are fueled by the emotion of love, one of the two emotions, with the other being rage, that most influence their user.