Minecraft Dungeons:Emerald

Emeralds are the main currency in Minecraft Dungeons (other currencies include enchantment points and souls). They are used to trade in the camp's trading area fto purchase artifacts and gear.

Obtaining
Emeralds are dropped by most mobs in the game, in various amounts, and can also be found in chests. Items can also be salvaged for emeralds and enchantment points.