Ore Minus
by mrgllitch
Ore Minus lets a server owner set how often each ore spawns, adjusting the rates per biome for vanilla and modded ores.
What it does
Ore Minus changes ore spawn rates through multipliers set in its configuration. A multiplier can raise or lower the rate of a given ore in a given biome, so diamonds can be doubled in deserts while coal is removed from mountains. Ore veins keep their natural clustering, so a diamond found in the world still comes with its usual four to eight neighbours.
The changes apply only to chunks generated after the setting is edited, so existing terrain is left as it is. Deepslate ore has two regular variants, and both need to be configured for a change to take full effect. The mod also works with modded ore content, which makes it useful for building custom distributions in modpacks.
Ore Minus is a Forge mod for 1.20.1, released under the GNU Lesser General Public License v3.0 or later, and it is open source. It is server-side only, so players join without installing anything. The first release was published on 2025-11-14 and the latest file, 1.2.1, followed on 2025-12-02.
Key features
Per-biome ore multipliers
Ore spawn rates can be set separately for each biome, so an ore may be common in one region and rare in another.
Vanilla and modded ores
Multipliers cover vanilla ores as well as ores added by other mods, giving one configuration for the whole world.
Vein generation control
The mod changes how ore veins generate, keeping clusters natural while adjusting how often they appear.
Distribution viewer
A companion Ore Minus Distribution Viewer builds a searchable webpage showing where each ore can be found and at what rate.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Modpack ore tuning
Pack authors can set custom ore distributions so resources match the progression they intend.
Sharing distributions
Server owners can publish the distribution viewer output so players can look up ore locations.
Who it’s for: Modpack authors and server owners who want to control where ores spawn on Forge 1.20.1 worlds.
How it compares
Ore Minus is a server-side only Forge mod under the GNU Lesser General Public License v3.0 or later, and it is open source. Unigue ores is a Forge mod for 1.20.1 that runs on client and server, and it is not open source under All rights reserved. Experience Ore is a Forge mod for 1.20.1 that runs on client and server and is released under the MIT License, but it is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Ore Minus | Forge | 1.20.1 | Server-side only | 2025-12-02 |
| Unigue ores | Forge | 1.20.1 | Client and server | 2026-08-28 |
| Experience Ore | Forge | 1.20.1 | Client and server | 2024-09-16 |
Questions
Does Ore Minus need to be installed on clients?
Do changes apply to existing terrain?
Which Minecraft version does Ore Minus support?
In the catalog
Ore Minus is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 34,764 mods support Minecraft 1.20.1.
Similar mods
What the author says
Control ore spawn rates in specific biomes. Make diamonds spawn 2x in deserts, disable coal in mountains, or customize ore distribution for your world. Controls ore spawn rates by modifying vein generation. Ore clusters stay natural - when you find diamonds, you still get 4-8 together.
Official listing
- Modrinth page
- modrinth.com/mod/ore-minus
- Owner
- mrgllitch
- Published
- 2025-11-14
- Updated on Modrinth
- 2025-12-02
- Facts verified
- 2026-10-15