Guarantee players who put in the work will find diamonds! Even when faced with hoarders, cheaters, and just plain bad luck.

Despite the mining limiters and anti-x-ray solutions you've probably added to your server, areas can still run low on diamond ore and other desirable rares due to many factors - hoarding, greed, overpopulation, cheating, and randomness in Vanilla world gen. This problem is worst when new players get frustrated and quit your server before they've given it a fair assessment.

DiamondGuarantee solves the diamond starvation problem by detecting when a miner is having a streak of bad luck, then cleverly injecting diamond ores just out of sight where he's sure to discover them! It also ensures players can get glowstone and ghast tear, and have an opportunity to battle the Ender Dragon and get an elytra, egg, and dragon head as a reward (all configurable, and disable-able).

You can try the plugin on the CaveRaiders server. IP: caveraiders.minecraft.best

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From BigScary: "I created this Minecraft server plugin using the Bukkit API to fix starvation issues with rare resources like diamonds, glowstone, nether wart, and elytras. In Vanilla multiplayer, all of these quickly disappear from areas of the world, making it difficult for players who come later to gather those resources. DiamondGuarantee ensures that players who are making a real effort (as opposed to trying to farm or cheat) will find those resources. For example, it will add new diamond ores for players who are mining to find, and adds glowstone dust / nether wart drops to some nether monsters (with some anti-farming logic as well), and guarantees the ender dragon will drop an elytra on death.

BigScary stopped working on this project after Minecraft 1.10. Anyone may use my source code to continue the project, but see the LICENSE file for restrictions."
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Installation
Download DiamondGuarantee.jar into your server's plugins folder, then /reload or reboot your server.

How Diamond-Related Settings Work
The default configuration guarantees diamonds at the Vanilla rate - assuming efficient mining strategies like branch mining - without changing gameplay. You can tweak the settings to make diamonds more plentiful, or to require worse bad luck before the plugin will inject ore.

The concept is simple - players get invisible points for breaking stone (value depends on Y level where the block is broken), and lose points for breaking diamond ore. If a player's score reaches a level you specify, the plugin will generate an ore for the player to find (which, due to its placement, will be very difficult to miss). Blocks placed by players don't grant or subtract points when they're broken.

Diamonds will only ever be generated in the "diamond zone" in "normal" worlds. If your worlds aren't generated using the default world generator with default settings, then you should check and possibly adjust the diamond zone settings in the config file.

All config settings are per-world, so you can tweak settings for specific worlds.

Configurations

diamondZoneMinY: "Diamond Zone.Minimum Y Value" default -64
diamondZoneMaxY: "Diamond Zone.Maximum Y Value" default 20
generateDiamonds: "Diamond Generation.Enabled" default true
diamondValue: "Diamond Generation. Diamond Value" default 1000;
stoneValueOutsideZone: "Diamond Generation. Stone Value.Outside Diamond Zone" default 1
stoneValueInsideZone: "Diamond Generation. Stone Value.Inside Diamond Zone" default 3
deepslateValueOutsideZone: "Diamond Generation. Deepslate Value. Outside Diamond Zone" default 1
deepslateValueInsideZone: "Diamond Generation. Deepslate Value. Inside Diamond Zone" default 4
generateDiamondsLog: "Diamond Generation. Log Details" default false
ghastDustCount: "Ghasts Drop This Many Glowstone Dust" default 4
shulkerShellsCount: "Shulkers Drop This Many Extra Shulker Shells" default 1
dragonDropsEggs: "Ender Dragon. Drops Dragon Eggs" default true
dragonDropsElytras: "Ender Dragon. Drops Elytras" default true
dragonDropsHeads: "Ender Dragon. Drops Heads" default true

Commands

• Use /DGReload to reload settings from the config file.
• Use /DiamondScore to check a player's current score.
• Use /SetDiamondScore to change a player's current score.

Permissions
All your players will benefit from the plugin. These permission nodes control who has access to administrative features.

• diamondguarantee.admin.* will conveniently grant all of the following permissions:
• diamondguarantee.reload
• diamondguarantee.getscore
• diamondguarantee.setscore