Terracotta

Hardened clay is a block with a blast resistance comparable to that of stone-based blocks. It serves no purpose but as a decorative building material and as a moderate blast-resistant material. Hardened clay can be obtained by smelting clay blocks.

Behavior
Hardened clay has the same explosion resistance as most other stone blocks, which is significantly higher than the block of clay it's made from. A block of hardened clay one meter away from an explosion will protect any blocks behind it, though it will be destroyed in the process.

Stained Clay
Stained clay, also known as stained hardened clay, are colored variations of hardened clay. They are available in the same 16 colors as wool, although the shading of the color is less vibrant. Nevertheless, stained clay is a beneficial alternative to colored wool due to its smoother and softer texture when used in building structures and art.

Trivia

 * Hardened clay was suggested by BlameTC.
 * Stained Clay has the same blast resistance as ordinary hardened clay.
 * Hardened Clay placed against TNT will protect any block behind it from the explosion, but will be destroyed in the process.
 * There is no actual blue hardened clay. Dyeing it blue or teal will create a purplish color.