About Rainbows & Radium
From ModrinthPowerful new ores can be used to make customizable bombs, 128-slot barrels, a modular chest-locking system, Ender Pearls enchanted with Infinity, Paxels, multi-use Totems, and more!
Important Stuff
-Overview-
_To give you a rough idea of what is included without making you read about every single feature._
- Deepsteel Bombs can be crafted and customized to ignore armor, damage terrain, prevent healing, and more!
- 84-slot Uranium Barrels can hold many more items than a chest in just one block of space
- Polychromite Pearls are enchanted with Infinity, so you will only need one
- many functional foods like Fairy Bread, Polychromite Apples, and more
- new combat & utility-oriented Status Effects (offense and defense)
- Polychromium Totems function as multi-use Totems
- another EPIC new Music Disc by @TenM
-Images-
_For the descriptions of the pictures, go to the "Gallery" tab._
_Shhh... we don't talk about this_ 
-Getting Started-
_A quick explanation of how to locate the content in a Survival playthrough_
Polychromite-Infused Sand and Polychromite Ore will spawn in the desert, Deepsteel Ore will spawn in the Nether, and Radium Ore and Deepslate Radium Ore will spawn in caves and underground. (Check the "Items/Ingredients tab to see how to use the raw materials).
To use most Polychromium items, you will need to find a Quarry, a new structure that spawns in the Desert. They have about the same frequency as Desert Temples, so they shouldn't be too hard to find. In this structure, you can loot chests and brush Suspicious Sand to find a Polychromium Upgrade Smithing Template (along with many other items), which you will need to use in a Smithing Table to upgrade gear.
-My Other Projects-
_These mods may not all be updated to the latest version. All of these mods are owned and maintained by me._
Rainbows & Radium - Powerful new ores can be used to make customizable bombs, 128-slot barrels, a modular chest-locking system, Ender Pearls enchanted with infinity, Paxels, multi-use Totems, and more!
Savage Cyclopes - New Cyclops entities can be found across all 3 dimensions. Some are hostile, attacking you with poisonous darts or magic, while others are neutral or passive, bartering with or assisting you in your various adventures. Enticing rewards are granted to those who can defeat them.
Beastly Buggers - Unique and useful items can be obtained by facing new and difficult insects and arachnids, each with a unique spawn location to incentivize exploration. Increasing the challenge of Minecraft in fun and vanilla-friendly ways is the purpose of this mod.
Funky yet Functional - Adds a few silly new items, all of which have their own functionality, including spicy peppers that make you breathe fire, beans that let you fly via flatulence, and so much more!
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Content & Features
Items
Ingredients
Chromite Nuggets (found in six colors: red, orange, yellow, green, blue, and purple) can be obtained by mining Chromite Ore (a sandstone variant found in the desert), with a chance to get 1-3 colors and 1-4 nuggets of each color. They can be combined in a Crafting Table (no specific pattern required) to make Raw Polychromite. This can be smelted into a Dull Polychromite Ingot, which can be combined with a Glow Inc Sac in a Crafting Table to create a Polychromite Ingot. Polychromite-Infused Sand has a chance to replace sand in the Desert, and will drop 1-4 Polychromite Dust. Putting four Polychromite Dust in the crafting table creates a Polychromite Ingot. 4 Polychromite Ingots can be combined with 4 Netherite Ingots to create Polychromium Alloy.
Radium Sludge is dropped from Uranium Ore (and it's Deepslate variant), and 4 can be crafted together to make a Uranium Ingot.
Deepsteel Plates have a chance to be found when brushing Suspicious Sand in a Quarry (A new structure that spawns in the desert).
Disc Fragments can be found by brushing the suspicious sand in Quarries. When 9 are combined in a 3x3 crafting grid, the new Music Disc "Below" by @T_en_M is created.
Tools
Highlights
From source dataGame versions
Supports 10 Minecraft versions, the newest being 1.21.11.
Loaders
Runs on Fabric and Quilt.
Footprint
Rated a light load on a server.
Rainbows & Radium on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Fabric, Quilt
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.3.0-1.21.11, released 2026-01-05
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Fabric | 1.21.8 to 1.21.11 (4 versions) | 1.21.11 |
| Quilt | 1.21.8 to 1.21.11 (4 versions) | 1.21.11 |
From 5 recorded builds of Rainbows & Radium.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 1.3.0-1.21.11 | 2026-01-05 | 1.21.8 to 1.21.11 (4 versions) | Fabric, Quilt |
| 1.2.3-1.21.10 beta | 2025-12-01 | 1.21.8 to 1.21.10 (3 versions) | Fabric, Quilt |
| 1.2.2-1.21.10 | 2025-10-30 | 1.21.10 | Fabric, Quilt |
| 1.2.1-1.21.10 | 2025-10-26 | 1.21.8 to 1.21.10 (3 versions) | Fabric, Quilt |
| 1.2.0-1.21.8 | 2025-09-22 | 1.21.8 | Fabric, Quilt |
Run Rainbows & Radium on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogWorld generation
Changes or adds to how new terrain, biomes and structures are created.
Runs on your server
From source side supportModrinth lists Rainbows & Radium as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- FabricQuilt
- Runs on
- Serverrequired on the server
- Game versions
- 1.21.11 and 9 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-02Open ↗
- ✓AuthorZeenyWeenyMC, as published on Modrinth
- ✓LicenseLicenseRef-All-Rights-ReservedFree












