How do I install Sirvicx's Caesium?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does Sirvicx's Caesium work with?

The listing gives Minecraft 1.21.8. This is the version stated by the author or source site, not something we verified ourselves.

Home›Java›Mods›Sirvicx's Caesium

ModsJava

Sirvicx's Caesium

Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.

by Sirvicx · on Modrinth

⬇ Download on Modrinth

Open in MC Java Mods Get it on Google Play →

this is caesium : a mod that adds a material called pebber which is used to make tools, INVISIBLE armor and even some blocks. you obtain it mixing raw iron and raw copper togheter. you can make eye drops with it too! just use 2 smelted pebber on top and 2 glass bottles on the bottom. it's that easy. try it for yourself! IT DOES NOT ADD ANYTHING ELSE, THE DESCRIPTION IS COMPLETE

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft version listed: 1.21.8
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as caesium-1.0.0.jar — drop this file into the mods folder
Download size: 48 KB
Download link checked 24 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 1.21