They only serve two purposes: You can craft them into emerald blocks and use them as decoration, or (the much better use for them) you can trade them with NPC villagers for various items. Different villagers will give you different things, from enchanted gear (but you have to also provide them with the gear to enchant) to bookshelves, and even bottles o' enchanting, which can only be gotten through villager trading or through creative mode.
You have to use a Iron Pickaxe to dig Emeralds ( Found in Extreme hills biome )
dimond
They are only in the 1.3.1 update and you have to look for them like you have to look for diamonds :P
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.
The fortune enchantment increases the amount of diamonds, lapis, redstone, coal and emeralds you get from each ore block.
no
because emeralds were added to be able to trade with the villagers
You have to use a Iron Pickaxe to dig Emeralds ( Found in Extreme hills biome )
You cannot cheat to get emeralds on Minecraft PE. You can find emeralds in Desert Temples, Stronghold Chests and Blacksmith Shops. You can also find world seeds online that have the coordinates for Emerald so you can mine emerald quickly. Emerald is decoration only in Minecraft PE.
dimond
Yes i did i got 10 diamods for 3 emeralds in minecraft 1.3.1
Infinite, as everything in minecraft. However, they are quite rare, and it is easier just to trade for them.
1.3 came out recently.
yes or else emeralds are almost useless
emerald blocks and you can use them to trade with villigers seince 1.3.2
Because emeralds are rare and they wanted power so they began looking for them but couldn't find any so they began trading
Diamonds. But in the next update (which is 1.3) emeralds are going to be the rarest item in the game.