Clay

Clay is a block that was introduced in version 1.0.11 (Seecret Friday Update 6) on July 25th 2010. It uses a light-blue/gray recolor of the Sand texture.

Obtaining
Clay can be found on the surface in groups of varying number by a body of Water usually surrounded by Sand. It is usually exposed, but is sometimes found under sand or water. It is uncommon, but not difficult to find if the player looks in the right spots. Players can gather clay by using any type of tool, but Shovels are the optimal choice. Destroying clay blocks will yield 4 balls of Clay each, which can be crafted back into a clay block.

If you're having trouble seeing if a block is clay or not, clay sounds like dirt and mines much faster than stone (especially with a shovel).

Uses

 * Used to make:
 * Brick Blocks
 * Clay Bricks

Trivia

 * Clay seems to have become much more common after the Halloween Update.