A is for Aquamarine

AQ wasn't fit to be a father, and he sure as hell wasn't fit to guide an exploration tour through the worst cave on planet earth.

Emeralds, rose quarts, and obsidian-ruby, opals, sapphire, and eosphorite. No gem could lessen the pain of losing his foster daughter in the labyrinth, and no gift could he get for his foster son to even think of forgiving him.