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Reduced Diamond Ore

Reduced Diamond Ore

DATA PACK
Reduces Diamond Ore spawn by cutting the generation frequency of the new diamonds added in 1.20.2.
by supercid87
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Updated Oct 14, 2026
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This datapack Reduces Diamond Ore spawn by cutting the generation frequency of the new diamonds added in 1.20.2.

Frequency lowered from 2 to 1.

Vein lowered from 8 to 4.

Range changed from (-3 to -64) to (-30 to -64) *Note normal diamond ore still spawns in the default range this change is just for the new ones that were added in 1.20.2.

Made this mod after coming back to minecraft and finding out they basically doubled the amont of diamond ores that generate. Mined for 1 hour with my friends and already had a ridiculous amount ruining progression.

If you share this  sentiment enjoy using this datapack.

In-depth testing has shown this on a seed in a specific area.

Standard 1.21.1 World
18 Diamond Ore
854 Deepslate Diamond Ore
(872 Total Diamonds) (+56% from 1.20.1)

Reduced Diamond Ore 1.21.1 World
20 Diamond Ore
625 Deepslate Diamond Ore
(645 Total Diamonds) (+15% from 1.20.1)

1.20.1 World
13 Diamond Ore
545 Deepslate Diamond Ore
(558 Diamond Ore)

You can expect around a +15% increase in diamonds for the whole world compared to 1.20.1 vs the +56% increase experienced in the most latest version.

ReducedDiamondSpawn1_21_1fix2.zip
MC 1.21, 1.21.1
Release 2024-09-09 Get

Requirements & install

How to use this data pack in Minecraft
Mods needed
None, works in vanilla
Minecraft
1.21 – 1.21.1
Install folder
saves/<world>/datapacks

How to install data packs

  1. Download the data pack .zip file (do not extract it).
  2. New world: click Data Packs on the world creation screen and drop the .zip in. Existing world: open .minecraft/saves/<world>/datapacks.
  3. Put the .zip into the datapacks folder of the world (servers: world/datapacks).
  4. Run /reload in game (or rejoin the world) and check it with /datapack list.
Browse more: Data Packs for 1.21.1 All data packs

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