Scaffolding: Breaks in one punch, gets 16 in one craft

Reinforced Sand: Sand that doesn't fall and is used to make Silicon

Evolved Sand: Currently only found in Dwarven Temples in the Evolved Desert.  It is stronger than normal sand, cannot fall, and has pretty much the same uses of it.

Evolved Sandstone:  Also only found in Dwarven Temples and can be crafted with Evolved Sand.  It is a decorative block but is also very strong.