Emerald

An Emerald is an item dropped when Emerald Ore is mined or more commonly obtained through Trading with Villagers. It can also be found in Desert Temples and Jungle Temples.

Emerald can be used as a form of currency in exchanging items with villagers.

Usage
The only use for Emeralds is in exchanging them for items and vice versa. It can be mined from extremely rare Emerald Ore, which is more rare than Diamond Ore since it is hardly ever found in groups and only found in the 'Extreme Hills' and 'Extreme Hills Edge' biomes, and nonexistent elsewhere. To be able to trade with villagers, simply right-click them, and a trade menu will appear. To trade Emeralds with Villagers, the player must place them into the Trading Menu's left slot in the amount requested above the slot. The player can then take the resulting item from the right slot. This applies conversely to obtaining Emeralds in trade. They cannot be crafted into tools. However, Emerald Blocks can be made, similar to the other ore blocks, and used as a building material or storage method. However, players may find using emerald blocks as a building material impractical due to its rarity.

Bugs
Sometimes, when shift-clicking items from Trading, the Emerald will glitch and will not be able to be used. The same goes for all items.