Limestone Flux is a unique item that can be used to increase the output of smelting Octine Ore and Syrmorite Ore. The flux is placed in the additional far left slot/s of the Sulfur Furnace or Dual Sulfur Furnace. Each smelt will consume one flux in this slot and will give the ore a small chance to yield two corresponding ingots rather than just one. Keep in mind that it only works with smelting these ores, not anything else.
- Beta 2.0.3: Recipe using Chiseled Limestone removed.
- Beta 1.0.0: Introduced.