After Eight's sporadic teleportation from India, he, Marina and Ella find themselves in the Gulf of Aden near Somalia. Marina discovers that the Loralite rock is at the bottom of the sea. Eight activates the Green Crystal, which glows and produces a strong force of wind that creates a crater in the water and the group are able to pass through the water to the bottom, effectively in a bubble of air. At the bottom they are able to teleport again.
The Green Crystal likely disintegrated with the death of Number Eight.