Emerald

Emeralds can be obtained in multiple ways, the most reliable of which is trading with villagers. Villagers use emeralds as their primary form of currency. They will either buy or sell goods for emeralds. You can also find emeralds by mining emerald ore, but this mineral is very rare. Emerald Ore drops one emerald when mined using an iron or better pickaxe. The most reliable way to get emeralds is through trading since they are rarer than diamonds.

Deepslate emerald ore (via screenshot)

Emeralds are used as currency by villagers and wandering villagers. You can either buy items from villagers for emeralds or sell them items and receive emeralds in return. You can turn emeralds into blocks of emeralds which can be used to power beacons. However, emeralds aren't necessary for that and can be substituted with iron, gold, diamond, or netherite blocks.

Individual emeralds can be used to select powers from a beacon but they can also be substituted by iron ingots, gold ingots, diamond ingots, or netherite ingots.

A farmer offering trades for emeralds (via screenshot)

Emeralds are an important mineral that is used primarily as a currency. Beacons can also be powered by emerald blocks, but emeralds aren't strictly necessary for this purpose, meaning they can be substituted by other minerals such as iron, gold, or diamonds.

Q. Is emerald the rarest ore in Minecraft?

A. Yes, emerald ore is considered one of the rarest ores in the game. It is thirty times rarer than diamond ore.

Q. What is the use of emerald blocks?

A. Emerald blocks are used to either store emeralds or to power beacons.

Q. Can you craft emeralds?

A. No, emerald cannot be crafted on a crafting table or in a furnace.