This is one in a series of Lantern Corps Themed caches. It will involve some research on the heroes and villains that make up these Lantern Corps.
Each Corps represents a color and an emotion that goes with it. Red = Rage, Orange = Avarice (Greed), Yellow = Fear, Green = Willpower, Blue = Hope, Indigo = Compassion, Violet = Love, Black = Death, White = Life. The Central Power Battery of each color houses the single color light for that Emotion. The Ring that each Corps Member wears draws it's power from the Central Power Battery or a smaller battery assigned to the Corps Member. This power allows varying abilities such as flight, construct projection (physical creations made out of light that can be anything the wielder imagines), and enhanced stamina. Each cache will focus on just one of these corps and will involve some math and research skills. The hide shouldn't be too hard either. Have fun and ask any questions you'd like!
The Star Sapphires are first mentioned in the context of a group during a conversation between Carol Ferris and Hal Jordan immediately after Ferris has just recovered from having been possessed by the Star Sapphire stone during Mystery of the Star Sapphire. Ferris explains that while under the possession of the stone, she learned a number of things about its history and capabilities. She says that it told her that billions of years ago, when the Guardians of the Universe decided to form the Green Lantern Corps, a tribe of women left Oa because they did not agree with the Guardians' belief in living a life without emotion. They said they would continue on their own existence living with emotions, starting with love. They searched the universe for billions of years for the thing the Guardians feared, and eventually found it on a planet called Zamaron. They learned of love from the first Star Sapphire gem, which was discovered locked between the embrace of two crystallized skeletons inside a cave. She explains to him that despite the fact that he had been able to defeat the various incarnations of the Star Sapphire he'd encountered up until then, other Green Lanterns had not been as fortunate. She describes another Star Sapphire falling in love with a Green Lantern and encasing his world in violet crystal so that the two could be together forever. She also mentions that the Star Sapphire gem is like the green power rings used by Green Lanterns and the yellow power rings used by Sinestro Corps members.
Each Corps has an Oath it states from time to time, usually to recharge their ring. This is the Star Sapphire Oath:
"For hearts long lost and full of fright,
For those alone in Blackest Night.
Accept our ring and join our fight,
Love conquers all with violet light!"
In order to find this cache, you will need to do some math. Find what Space Sector each member of the Corps is from or assigned to protect (these may be the same number or could be different). Replace their name with the Space Sector Number and apply the following equations to the last three digits of the coordinates above:
North: - Queen Aga'po + Fatality - Miri Riam + 1764
West: + Dela Pharon - Fatality + 93
Make sure to make note of the clue on the cache log in order to find the War of Light / Blackest Night Cache!