ustersone bricks, as well as several other items.
1.1.2 Tconfig VersionThe Heartstone biome is one that is generated when a world is generated. It can contain around 1000 Heartstone(the tile), which is a material in crafting both Heartstone Bricks and Life Crystals(at a cost of 120 per). It may also have some Crystal Hearts generated inside it. Heartstone can be sold for 1 Silver 25 Copper a piece.