OP Ruby Addon
by Agera63
OP Ruby Addon brings a late-game ruby resource into world generation, where rubies are found deep underground and inside woodland mansions.
What it does
Ruby ore generates in deep caves and inside woodland mansions, and mining it with a diamond pickaxe or better yields Ruby Scraps. Four scraps arranged around an emerald form a full ruby, and nine rubies combine into a ruby block, which also serves as a decorative block.
Rubies are meant as a reward for deep exploration that goes beyond diamond, and the ore stays in line with vanilla progression. Most of their use comes from villager trading, where the armorer is the only profession that values rubies. Its trades offer enchanted items, including enchantment-table style enchantments on Netherite armor, for a set number of rubies. The author suggests creating a new world so the ore generates properly.
The addon is published for Fabric only, for Minecraft 1.21.1, and the mod runs on client and server, so the server and every player need it. The code is under the MIT License, but the project is not open source.
Key features
Ruby ore in deep caves
Ruby ore generates naturally deep underground and inside woodland mansions, placing it far from the surface.
Scraps and full rubies
Four ruby scraps around an emerald craft a full ruby, and nine rubies combine into a ruby block.
Ruby block decoration
The ruby block works as a decorative building block alongside its role as stored currency.
Armorer trades
Armorers offer strong trades for rubies, including enchantments on Netherite armor, so rubies act as a currency for late-game purchases.
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
Ruby Things is an MIT-licensed, open source Fabric addon for 1.21.1 that runs on client and server, like this one. Rubybound is server-side only, is not open source, and is published for 1.21.11, so players join it without installing anything. Enough Rubies is also an MIT-licensed Fabric mod for 1.21.1 that runs on client and server, and its source is open.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| OP Ruby Addon | Fabric | 1.21.1 | Client and server | 2025-08-23 |
| Ruby Things | Fabric | 1.21.1 | Client and server | 2024-11-17 |
| Rubybound | Fabric | 1.21.11 | Server-side only | 2026-07-18 |
| Enough Rubies | Fabric | 1.21.1 | Client and server | 2025-04-19 |
Questions
Does OP Ruby Addon have to be installed on the server?
Why does the author recommend a new world?
In the catalog
OP Ruby Addon is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
This mod adds a vanilla-friendly Ruby as a rare, late-game resource to Minecraft. Rubies are designed to reward deep exploration and progression beyond diamond, while staying consistent with the vanilla experience. Ruby ore generates naturally deep underground in caves and can also be found inside woodland mansions…
Official listing
- Modrinth page
- modrinth.com/mod/op-ruby-addon
- Owner
- Agera63
- Published
- 2025-08-21
- Updated on Modrinth
- 2025-08-23
- Facts verified
- 2026-10-15