Ores Reduced
by exe_data
Ores Reduced lowers how many ore veins and how large they are during world generation, so ores stay scarcer across the Overworld and Nether.
What it does
The mod changes only the ore veins the game places in stone. Vein size and vein count can each be scaled, and large veins can be made rarer. Its default setting matches a classic setup with both reductions at 0.5, and the two stack, so the default leaves roughly a quarter of vanilla ore. Gold is kept out of the reduction by default, and a config edit can add other blocks to the excluded list.
Caves, lava lakes, water bodies, structures and every other ore keep their original shape and placement. Decorative blobs such as andesite, diorite, granite, tuff, gravel and dirt are left at their vanilla amounts by default, and infested stone, clay, magma, soul sand and blackstone can be included through one config edit. The mod is server-side only, so players join without installing it, and it requires Fabric API. Files are published for Fabric 1.21.4 only, with 1.0.0 as the latest build, under the MIT License, and the code is not open source.
Key features
Vein size control
Each ore cluster can be made smaller, so a cluster holds roughly half the blocks it does by default, and any other scale can be chosen instead.
Vein count control
The number of veins generated per chunk can be cut, and large veins can be set to appear less often than normal.
Excluded ore list
Blocks in the excluded list keep their vanilla generation, with gold excluded by default.
Stone-only replacement
Ore generation only replaces stone with ore, so plain stone, deepslate and netherrack remain as they are.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Hardcore survival
A world with fewer and smaller veins makes mining slower and gives each ore more weight in progression.
Server pack tuning
Server owners can set the reduction levels in config and keep the mod lightweight, since it only changes world generation.
Who it’s for: Server owners building survival or hardcore worlds, and modpack makers who want slower ore progression without changing other world features.
How it compares
Diagenesis is server-side only, open source under the GNU Lesser General Public License v3.0 or later, and published for 1.21.11 with Fabric and NeoForge files. Larger Ore Veins: Diamond requires the server but leaves the client optional, is not open source, and covers Fabric, Forge and Quilt for 1.19 – 1.21, where it enlarges diamond veins instead of reducing ores.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Ores Reduced | Fabric | 1.21.4 | Server-side only | 2026-06-26 |
| Diagenesis | Fabric and NeoForge | 1.21.11 | Server-side only | 2026-03-09 |
| Larger Ore Veins: Diamond | Fabric, Forge and Quilt | 1.19 – 1.21 | Server required, client optional | 2024-06-13 |
Questions
Does Ores Reduced need Fabric API?
Does a player need to install Ores Reduced?
Can gold be reduced as well?
In the catalog
Ores Reduced is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 17,979 mods support Minecraft 1.21.4.
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What the author says
OresReduced makes mining matter again. It lowers ore world generation so that resources are scarcer and more valuable — fewer veins, smaller veins, and rarer large veins — across the Overworld and the Nether. Perfect for survival servers, hardcore worlds, and any pack that wants a slower, more rewarding progression…
Official listing
- Modrinth page
- modrinth.com/mod/ores-reduced
- Owner
- exe_data
- Published
- 2026-06-26
- Updated on Modrinth
- 2026-06-26
- Facts verified
- 2026-10-15