Does this sound like a good story? Also need help with main character name.

The main character is normal until her 13th birthday, on the morning of the 13th she get's a blue agate stone. at her bustop thereis someone else wearing a stone also. when she gets to schol a teacher 의해 the name Nathan Modley asks her to come to his office. she is taken to a 성 known as Stone Palace where powers of all sorts are taught, the powers are used through the stones, Nathan, Haidyn (purposely spelt liked that) and the main character go on all sorts of adventures, people stay at the palce for 7 years