Clay

Clay blocks are a type of block crafted from four balls of clay. Their appearance is similar to sand except for the color which is light-blue/gray. Clay can be found on the surface in groups of varying number by a body of water.

Players can gather clay by using any type of tool, but shovels are the optimal choice. Destroying clay blocks will yield four balls of clay, which can be crafted back into a clay block. Clay balls can be smelted to make bricks, which can later be made into brick blocks. Clay is sometimes found underwater, or even under sand, but it is usually above water and exposed.

History
Clay was added in version 1.0.11 (Secret Friday Update 6) on July 25th 2010