This gem is obtained as part of Nasir's quest. Can be sold to him for 1000 gold (+6 skill points in the process) or be used to repair a machine.
Note that the Yellow Sapphire can be used to repair the bridge at the Dead River, just like the The Eye of Thor-Agoth.
Lore[]
A rare yellow sapphire cut to perfection. The center of the gem is very dark, almost making it look like an eye.