Aetherium [Fabric & Neoforge]

Each vanilla item or block can be assigned an Aetherium Value, and items converted into Aetherium can be used to recreate other items the player has already learned. The currency runs from the small Aetherium Dust, worth 0.001 Aetherium, up through the Aetherium Crystal, the Aetherium Ingot and a series of compressed blocks, the last of which is worth one decillion Aetherium. Currency Crystals stack to 1000 and some are not yet obtainable.

The mod draws its idea from Equivalent Exchange 2 and takes a different direction from ProjectE, and it is not a direct copy of either. Its progression is steeper than ProjectE's, and the author plans more Aetherium Values over time, with a goal of eventually covering vanilla items. Development is still active, and the Aetherium cap was last set on 7 July 2026.

Aetherium is built for Fabric only, for game version 26.2, and runs on client and server, so the server and every player need it. The code is available as source, and an issue tracker and wiki are linked from the project. The license is a custom one, and the project is not open source.