Star of Elune

Star of Elune is a gem that is used in both Jewelcrafting and in Engineering, the gems fit.

Source
This gem is mined from Fel Iron, Adamantite, Rich Adamantite and Khorium deposits. It is also a world drop.

Star of Elune as an ingredient
Star of Elune is used in the following recipes:

Jewelcrafting

 * Gems:
 * Gems: