Diamond

Diamonds are the gems that are dropped when Diamond Ore is mined. Diamond is considered one of the most valuable items in the game due to their scarcity and use as a crafting material. They are needed to make Enchantment Tables and Jukeboxes. They can be compactly stored in blocks of 9, which can easily be converted back to diamonds. Tools made from diamond are the most durable in the game, and are the second most efficient behind Gold, although those have very low durability. Diamond pickaxes are the only pickaxes that can be used to mine Obsidian.

Diamond is the second rarest mineral in the game, after Emerald Ore. The texture is also one of the many symbols and icons used for Minecraft today.

Diamond is the 4th tier of crafting tools, and the 5th tier of armor including chainmail.

Pocket Edition
Use these to create very strong tools, weapons or armor

Mining
Diamond Ore can be found in layers 1-16, in small veins of 1-8 ores, and can only be mined using an iron or diamond pickaxe. Read more about finding, mining and using diamonds in the diamond tutorial.

Natural Occurrence
Diamonds can rarely be found in naturally generated chests, such as those found in a Village, Desert Temple, Abandoned Mine Shaft, Jungle Temple, or a Nether Fortress.

Smelting
Like most other ores except gold and iron, smelting the ore is wasteful, as the Fortune enchantment cannot apply and a smaller amount of experience is awarded.

As a crafting ingredient
The diamond is used to make the greatest tier of tools and armor, making it one of the best items to find in the game. Also, In the Pocket Edition, the Nether Reactor Core is crafted with three diamonds and six iron ingots.

Trivia

 * Diamond tools and armor are renewable since they can be bought from Villagers. Diamonds themselves remain non-renewable.
 * Diamonds are a well-known item because they are one of the most shown things on merchandise, others being Steve and creepers.

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