Pyramid Jewel

The Pyramid Jewel is one of the four Jewels needed to unlock Tarm Ruins. It is hidden in one of two places. In a non-linked or return-linked game, it is at the end of a underwater cavern outside the Dancing Dragon Dungeon. In a main-linked game, it is tossed onto a ledge at the base of the Sunken City Falls by Vire, who shows up when you open a chest there.