Rain crystal

The Rain crystal was a kind of lifeform native to the Green Planet.

Biology
A semi-sapient mineral found in the ground of the Green Planet. It is a glowing crystal, but its face is dark, darkened by the stormy potency within it. Asogian s can communicate with these stones to summon rain clouds in the area.

Appearance

 * E.T. The Book of the Green Planet by William Kotzwinkle