Crimstone Block

Crimstone is a block type found in The Crimson. Before Hardmode, it is most prominent in the lining of Chasms. It requires at least 65% Pickaxe power or explosives to mine.

Crimstone is the Crimson version of Stone. As with its Corruption counterpart, the Ebonstone, Crimstone can be converted into ordinary Stone via Purification Powder.

In Hardmode, the spread of Crimson converts ordinary Stone blocks into Crimstone. Crimstone itself also spreads Crimson to susceptible blocks nearby.

Crimstone can be crafted into Flesh Blocks at a Meat Grinder, which can then be crafted into furniture. It can also be crafted into Crimstone Bricks.

Trivia

 * "Crimstone" is a portmanteau of the words "Crimson" and "Stone".