
Modrinth · Minecraft mod
Cobalt Age
The first lagless redstone alternative, finally waterloggable and optimized, independent and incompatible with redstone, comes with cobalt sets and decorative blocks
Quick answer
Which Cobalt Age release should I use?
Cobalt Age 1.2.2-26.3 targets 26.3 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. All 1 required mods have matching files.
Where it goes
Is Cobalt Age required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Cobalt Age 1.2.2-26.3 need?
1.2.2-26.3. Change the file and its required mods may change too.
Install Fabric API first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Cobalt Age without breaking your instance.
Built for Cobalt Age 1.2.2-26.3. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.2.2-26.3. It targets 26.3 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fabric API first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.2.2-26.3. It opens that exact file at the source.
About this project
What does Cobalt Age add?

This mod adds a new mineral to the overworld, the cobalt. It can be found between y=-64 and y=32, with it being more common the nearer you are to y=-16. It requires iron tools or superior to be mined, dropping raw cobalt which can then be smelted to obtain cobalt ingots.
The ingots can be used to either create a new type of rail, used as a trim material, or to make cobalt nuggets, which combined with redstone dust can create cobalt dust, and the dust can be used to craft a new set of redstone components made of cobalt.
This new cobalt components are waterloggeable, meaning you are now able to do redstone circuits under water or prevent them being broke if water touches them.
Cobalt Age showcase:
Complete Cobalt Age Set:

Cobalt Block is compatible with the Beacon:

The new beacon GUI, the cobalt ingot has been added in the GUI.

Water does not break the blocks:

A closer look into the retracted state:

High Performance Signal Engine
Cobalt wires use a modern optimized signal propagation system capable of reducing computation costs compared to vanilla Redstone.
Cobalt components preserve vanilla update order and behaviour, including mechanics that rely on update timing and ordering, such as dupe machines.
Performance Tests
Scatter Test in a 100 x 100 wire linked web with 20 observer clocks. Cobalt dust does not cause not even a minimum server lag or client FPS drops (10 ms over 50 ms), while redstone dust cause a huge lag and a huge delay of 2.8 seconds from a tick to another one (130+ ms over 50ms). You can see the delay in the redstone update signals in the shown videos.
Independent Energy Systems
Cobalt components are completely independent from redstone components, meaning they wont interact between each other in any way.
Example of independence

Parallel Wires

More independece examples

Even more examples
Showcase of the Glass Diode for Cobalt Wires. The logic has been inherited by Redstone Wires.
ON / OFF Showncase images for mixed blocks underwater and surface.


Cobalt Rail
Supports experimental minecart improvements
The cobalt rails are a new type of rail similar to the powered rail that can reach higher speeds (by default a speed of 24 blocks per second).
To craft this type of rails you will need 6 cobalt ingots, one cobalt dust and one breeze rod (yes, kinda expensive, but with that speed is understandable). The crafting pattern is similar to the powered rail one.
There's also two new custom gamerules that lets you change the speed of both powered and cobalt rails. The gamerule syntax is cobaltage:max_minecart_speed_<type> <value> with type being the type of rail, and value the speed of the rail, which is a value between 1 and 1000 both included.
Converter
The converter is a new redstone component that acts like a bridge between cobalt and redstone. It receives power from one type and outputs the same amount of power but from the other type. For example: if the converter receives a power level of 15 of cobalt, it will output a power level 15 of redstone.
To craft one you need one redstone torch, one quartz, one cobalt torch and three stone blocks.
Converter showcase

Converter ON / OFF Lever behavior. You can also see the indipendence of wires.

Cobalt Lamp
The cobalt lamp is a new light block that will emit an amount of light based on the power received, accepting only cobalt as the energy source.
It can be crafted with two cobalt blocks, one quartz, one glowstone, and one cobalt dust.
Relay
The relay is a block that can be used to do vertical signal transmission. It works as a dust, powering only upwards and downwards.
It can be crafted using 6 glass panes, two cobalt ingots and one cobalt dust. It will also require silk touch to be mined.
Cobalt Relay showcase
ON / OFF Showcase for the Relay.
A new look
Both cobalt ingot and dust can be used as trim materials, giving your armor two new blue tones.
Also a new armor trim template has been added: Dust. It can be obtained by trading with a wandering trader (though this is something temporal).
Dust Armor Trim & Cobalt Materials


Resource packs
Theres's 3 optional resource packs on this mod. One makes the cobalt rails have a 3D appearance. The second one lets the player see the power level the cobalt dust is emitting on a similar way to how the VanillaTweaks resource pack does. The last one puts the Beacon GUI in dark mode (Like Default Dark Mode does).
Spoiler



Credits
Thanks to:
- Vanilla Tweaks, for the models for both the 3d rails and the power level resourcepacks.
- Copper rails, as it was used as inspiration for the cobalt rails.
From Author
You can use this mod freely in your modpacks, but please give credit to the original authors and link back to this page. If you want to make a video about this mod, please also give credit and link back to this page.
If you want to suggest a feature or report a bug, please open an issue on the GitHub repository!
It sucks to put this here but it's not like I have another option.
This mod originally was done by two people: me (the one who had the original idea) and kole07139. There were some internal issues and the thing ended with him being kicked. The story is way longer than this and im willing to explain everything if needed.
After being kicked, he started defamating a lot about me and created another page for the mod saying this one is stolen and stuff like that. Obviously all those allegations are false and as for now I'm trying to find a way to solve everything, but sadly I'm very limited on the things I can do as even talking with him is not an option now.
Project description from Modrinth.
Pick your setup
Cobalt Age by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.3
1 loader build26.2
1 loader build26.1.2
1 loader build1.21.11
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Cobalt Age versions and loaders
1.2.2-26.3
cobaltage-1.2.2.jar
9 Nov 2026
1.2.2-26.2
cobaltage-1.2.2.jar
9 Nov 2026
1.2.2-26.1.2
cobaltage-1.2.2.jar
6 Nov 2026
1.2.2-1.21.11
cobaltage-1.2.2-1.21.11.jar
8 Sept 2026
1.2.1-26.2
cobaltage-1.2.1-1.26.2.jar
6 Aug 2026
1.2.1-26.1.2
cobaltage-1.2.1.jar
6 Aug 2026
1.2.1-1.21.11-Fabric
cobaltage-fabric-1.21.11-1.2.1.jar
4 Jul 2026
1.2.1-1.21.11-NeoForge
cobaltage-neoforge-1.21.11-1.2.1.jar
4 Jul 2026
1.2.0-1.21.11
cobaltage-1.2.0.jar
12 Jun 2026
1.1.1-1.21.11
cobaltage-1.1.1.jar
26 May 2026
1.1.0-1.21.11
cobaltage-1.1.0.jar
17 May 2026
1.0.1-1.21.11
cobaltage-1.0.1.jar
27 Apr 2026
Looking for an older file? The official Modrinth project page is in Resources.