Bars are crafting materials generally crafted from mined ores at a Furnace. Crafting most ore-related items requires that raw ores are first crafted into bars.
The Calamity Mod currently adds 9 different bar types. Obtaining many of these only requires their respective ores as crafting ingredients. Astral, and Auric are exceptions that require secondary materials in addition. Cosmilite Bars are not crafted but are instead dropped by The Devourer of Gods respectively. Some bars may also be obtained from crates after a certain boss is defeated.
- Cosmilite Bars are the only bars that are exclusively obtainable from bosses.
- Bars on the vanilla wiki.