Polished Gems
Polished Gems adds ruby blocks, deepslate ruby ore below y=0 and decorative variants such as Sparkling Bricks to Fabric worlds on 1.21.1.
What it does
Rubies are the focus of the mod, which gives the material a distinct role in the game. Ruby ore appears in deepslate at levels below y=0, so it is a common find for players mining underground. Ruby blocks can be used as beacon bases, and a set of new blocks built from rubies, including Sparkling Bricks, adds a more vivid variant to building projects.
Polished Gems fits alongside vanilla content rather than replacing it, and it adds extra creative tabs so the new items are grouped with the rest of the game. The author states that the mod is being rebuilt from the ground up and that updates are planned. The mod depends on Fabric API. It runs on client and server, so the server and every player need it, and it is published for Fabric only, with the latest file 0.0.3 for 1.21.1 dated 2026-04-15 on the alpha channel. The mod is released under the MIT License and is not open source.
Key features
Ruby ore in deepslate
Ruby ore generates in deepslate below y=0, giving players a common source of the gem underground.
Ruby blocks for beacons
Ruby blocks serve as a beacon base, so the gem has a practical use alongside its decorative role.
Ruby-based building blocks
Blocks made from rubies, such as Sparkling Bricks, provide a more vibrant variant for building.
Extra creative tabs
Additional creative inventory tabs group the new items and blocks together.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Building with rubies
Builders who want a red gem palette can use the Sparkling Bricks and other ruby blocks in structures.
Underground mining
Players exploring deepslate layers below y=0 can collect ruby ore as a source of the material.
Who it’s for: Players who want a ruby-themed decoration and resource addition to a Fabric world on 1.21.1, and builders who work with colored block palettes.
How it compares
Ruby Things is open source under the MIT License and also runs on Fabric 1.21.1 with client and server support, so it covers the same version and environment. Enough Rubies is open source under the MIT License, also for Fabric 1.21.1 and client and server. Polished Gems is not open source, while Rubybound is server-side only and released under All rights reserved, so players can join without installing it.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Polished Gems | Fabric | 1.21.1 | Client and server | 2026-04-15 |
| Ruby Things | Fabric | 1.21.1 | Client and server | 2024-11-17 |
| Enough Rubies | Fabric | 1.21.1 | Client and server | 2025-04-19 |
| Rubybound | Fabric | 1.21.11 | Server-side only | 2026-07-18 |
Questions
Does Polished Gems require Fabric API?
Does the server need Polished Gems?
Where does ruby ore generate?
In the catalog
Polished Gems 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
Will be updated soon! Rebuilding the mod from the ground up. This mod adds Rubies! But why should you choose this mod over others that add the same kind of item? Because it's a little bit different than other takes on Ruby as a material!
Official listing
- Modrinth page
- modrinth.com/mod/polished-rubies
- Owner
- Sagittari2763
- Published
- 2026-03-24
- Updated on Modrinth
- 2026-04-15
- Facts verified
- 2026-10-15