Block of Emerald

Blocks of Emerald (also known as emerald blocks) are decorative mineral blocks.

Obtaining
Blocks of emerald do not naturally generate in maps.

Usage
Blocks of emerald can be used to store emeralds in a compact fashion.

Beacons
Blocks of emerald can be used to "power" a beacon. The top layer must be at least 3×3 optional lower layers can be adding as 5×5, 7×7, and 9×9 from top to bottom. The layers do not have to be entirely emerald blocks, as they may also contain blocks of iron, blocks of gold, and blocks of diamond.

Trivia

 * Jeb removed the old chest textures in terrain.png to make room for the Block of Emerald next to the other icons of items, causing the locked chest to have the blank, purple "texture" on its sides and the top texture of a Block of Emerald.
 * Emerald blocks are the only storage block to resemble the item they are made from, other than coal blocks.