Log

Wood is a naturally occurring block fundamental to the crafting of many blocks and tools in the game. They have a skin resembling bark on the four side faces, and a crosscut face on top and bottom. Wood is greatly abundant in naturally-generated maps, as it is used as the foundation for trees. Wood is also flammable.

There are currently six varieties of wood. The first is Oak, the first type of plank in the game, the second is Birch, which is white and has dark spots over it; the third type, Spruce, resembles Oak but is dark in color; the fourth type, Jungle, resembles Oak wood with bark aligned horizontally and has a green tint. Type number five is Acacia, which has grey on the outside, orange on the inside, and finally, log number six: Dark Oak, which is a darker version of the oak log.

Wood from different types of trees will produce different colors of wood planks when crafted and will not stack in the inventory. Birch trees have slightly duller colored leaves than regular trees, pine trees have pine needles, and jungle leaves are leafy with fruit-like shapes.

Obtaining
Wood can be chopped by hand, but using an axe consumes less time, but axes don't last forever. An enchanted diamond axe is handy to carry around with you all the time, while the humble, clean and renewable stone axes are more useful for mass forest-chopping.

Naturally generated
Wood blocks of all six types generate naturally as part of trees, even above layer 128. The types of trees generated depend on the biome:


 * Oak trees generate in forests, swamps, jungles, ice plains, and extreme hills.
 * Spruce trees generate in taigas only.
 * Birch trees generate only in forests. Birch is the rarest of the four wood types.
 * Jungle trees generate only in jungles. Jungle trees can occur in 2×2 dimensions instead of the normal 1×1.
 * Acacias are exclusive to savannas, and their trunks are diagonal, unlike others.
 * Dark oaks are found in Roofed Forests.

Besides forming trees, oak wood blocks can also be found in plains villages where they form the edges of farms and are also used in the corners and roofs of a few small huts. Pine wood can be seen in swamp huts.

From saplings
If there is enough space and light, a sapling will grow into a tree after a certain time, or, if bonemealed, almost instantly. This, combined with the fact that saplings have a chance to drop from destroyed leaves, makes wood a renewable resource. Saplings will even grow in the Nether or the End.

Usage
Wood blocks are often crafted into planks for building or further crafting. In addition, wood can be smelted in a furnace to make charcoal as a substitute for coal.

Further crafting
The following table presents the amount of wood needed to produce an even multiple of a given item with no waste left over, and the quantity produced:

As a fuel
Wood can be used as a fuel in furnaces, smelting 1.5 items per block.

It is advisable to use wood planks as fuel instead of wood, as they share the same burn time. However, it is advisable, if you do have wood, to smelt the wood and use charcoal as fuel.

Data values
The data value for wood blocks consists of two facing bits (high-order) and two wood type bits (low-order).

Note that when a wood block is placed, it changes its facing bits, placing in the direction relative to the block it is placed on.

Trivia

 * In real life, the number of rings on the inside of a tree counts the age of the tree. If one counts the rings of a wood block, the sum is four years.
 * Some oak trees and birch trees have the same structure: 5 or 6 wood blocks and a pattern of leaves that stays the same for both regular oak and regular birch trees.
 * It is possible for Birch trees to have 7 wood instead of 6.
 * Although wood is usually considered renewable, there is the chance for a tree grown from a sapling to drop 0 saplings, so if you begin with a set number of trees, it is potentially possible that all of them and their planted saplings will drop 0 saplings, depleting the resource; in practice, this is almost impossible because the probability of a tree dropping 0 saplings is astronomically low but still possible.
 * When a world that has a jungle biome in it is opened in 1.1 instead of 1.2.1 or further, the wood and leaf types will be changed into oak wood and leaves.
 * Birch and Spruce trees in Pocket Edition don't have a different color. If one was to craft wooden planks out of Birch or Spruce wood, they would be the same color as oak planks. The different types of planks are now planned for 0.8.0.

Gallery
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