Gemstones: The Steller's Rebellion

Samantha is a Pixter, a person with magic. Their lives are teathered to the gemstone that they are born with. A red gemstone is the most powerful, while purple is the least. Stellar's, steal their gemstones so they can have power. Samantha's brother, Ash, has his gemstone taken during an ambush in the forest. Samantha meets Ryan, who has quite a backstory, and a big secret. With Samantha and Ryan be able to save not only Ash, but the enter Pixter kingdom?