Emerald

"A bright green gem"

-Emerald Description

What is an Emerald?
An emerald is a rare item found in the Cactus Field in the Desert Room. It is the rarer alternative to getting a Thorn. It is bright-lime green, as you'd expect from the description. It is notably difficult to obtain.

(Add image of Emerald if possible)

Uses
It is not used in any potion, but is used for completing Boo's Daughter's quest as well as the Keeper Servant's quest, which both require gems from all Desert fields. It is not used outside of the Desert, unless you count the Keeper Servant's quest.