Because emeralds are rare and they wanted power so they began looking for them but couldn't find any so they began trading
because emeralds were added to be able to trade with the villagers
Yes i did i got 10 diamods for 3 emeralds in minecraft 1.3.1
You can use them to trade with villagers, if you right click a villager a UI will come up and you can trade things.there are different types of villagers, such as librarians.
The correct spelling is emeralds, and you get them by mining, the same way to get any ore. Emeralds are used for Emerald Blocks and trading with villagers. (I am giving you information from 1.7.4)
emerald blocks and you can use them to trade with villigers seince 1.3.2
I think you need an iron pickaxe. But it's much easier to just get emeralds from trading with villagers.
you can either find them in extreme hills biome and extreme hills edge biome or you trade them with villagers. Answer from Andy.
The ruby was going to be used as a currency for trading with villagers. However, in the release of version 1.3.1 it was replaced with emeralds.
Emerald are the main currency in NPC Villages. Many villagers want them for trading items with you. But before you trade remember that emeralds are very rare and most villagers offer crappy trades like emerald for flint.
If you are asking if you can just find weapons lying around in Minecraft, that is impossible. The two ways to get weapons in Minecraft are by, 1. Crafting them in a Crafting Bench, and, 2. By trading Emeralds to Villagers that are offering them.
No, villagers do not eat.
Villagers aren't available on Minecraft P.E. yet.