Adept Quest NPC
Qa'li al-Kesh tells you, "Take this crystal and hold it near three markers on the Dark Isle - by the Ruschk iceberg, the entrance cavern where Grael was imprisoned, and a low point in the Coral Forest. Once you have done that, bring it back here and I shall take it and reward you."
Ruschk Ice Mountain: [96.3N, 54.6E]
Fanatical Mukkir Cave: [86.9N, 59.7E]
Coral Forest: [87.4N, 56.9E]