Synthium Expansion
by Waysez
Synthium Expansion, a Forge mod for 1.20.1, adds a custom ore, a synthetic metal and a Synthesizer Machine for advanced crafting.
What it does
The mod introduces Synthium, a synthetic metal made from forged iron, copper, carbon and redstone energy. A new custom ore supplies the base material, and the Synthium Ingot is the main product of the chain. Two new crafting materials and a Powdered Carbon Redstone Fluid Bottle sit between raw ore and finished parts.
A brand-new machine, the Synthesizer, handles advanced crafting. Players feed it the components and forge the mysterious material that the author describes as able to surpass natural ores. The mod also includes a complete toolset made from Synthium, so the metal is used beyond the machine itself.
Synthium Expansion is published for Forge only, for Minecraft 1.20.1, and runs on client and server, so the server and every player need it. The mod is released under All rights reserved. The project is described as only a beginning, with future updates planned to expand the technology and its hidden energy.
Key features
Synthium ingot
The Synthium Ingot is smelted from forged iron, copper, carbon and redstone energy and serves as the core material.
Custom ore
A new ore generates in the world as the starting point of the Synthium chain.
Synthesizer Machine
A dedicated machine crafts advanced items from Synthium components and the new fluid bottle.
Synthium toolset
A full set of tools is made from Synthium, with the mod adding new tools to uncover the metal's potential.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Copper Tools is a Forge mod for 1.20.1 that is also client and server and all rights reserved, so it covers the same version and environment as Synthium Expansion but with a copper focus. Carbonium is another Forge option for 1.20.1 under All rights reserved, sharing this mod's environment. Shield Expansion Expansion differs in version, since it targets 1.18.2 – 1.20.1 for Forge, still client and server and not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Synthium Expansion | Forge | 1.20.1 | Client and server | 2025-10-27 |
| Copper Tools | Forge | 1.20.1 | Client and server | 2024-07-26 |
| Carbonium | Forge | 1.20.1 | Client and server | 2026-01-26 |
| Shield Expansion Expansion | Forge | 1.18.2 – 1.20.1 | Client and server | 2024-07-24 |
Questions
Does Synthium Expansion need to be installed on the server?
Which loader and version does Synthium Expansion support?
In the catalog
Synthium Expansion is one of 17,631 Equipment mods on ModsFinder, and one of 9,216 Equipment mods for Forge. 34,764 mods support Minecraft 1.20.1.
Similar mods
What the author says
Craft the Synthesizer Machine and forge this mysterious material capable of surpassing natural ores. Create powerful new tools and uncover the true potential of synthetic creation.
Official listing
- Modrinth page
- modrinth.com/mod/synthium-expansion
- Owner
- Waysez
- Published
- 2025-10-25
- Updated on Modrinth
- 2025-10-27
- Facts verified
- 2026-10-15