Wood

Bark is a block that has the log texture on six sides. It comes in 6 species: oak, spruce, birch, jungle, acacia, and dark oak.

Stripped bark is a variant obtained by right-clicking a bark with any axe.

Obtaining
Bark can be broken by hand, but using an axe will speed up the process.

Stripped bark
an axe on bark will turn it into stripped bark.

Crafting
Bark can be crafted out of four matching logs, yielding three bark as a result.

Usage
Bark can be used as a decorative block in place of normal logs.

Fuel
Bark and stripped bark can be used as a fuel in furnaces, smelting 1.5 items per block.