Flowstone

Flowstone is a mod that makes ores renewable resources.

In vanilla Minecraft, lava flowing over water always generates a stone block. With Flowstone, there is a chance that it will generate a random ore block instead.

By default, all eight vanilla overworld ore blocks (coal, copper, iron, gold, lapis, redstone, emerald, and diamond) can be generated with a 1% chance each.

(In the GIF, each ore block has a 100% chance for example purposes.)

Generators

Flowstone uses a custom flowstone:generators dynamic registry to determine whether and how to replace an about-to-be-generated block.

Said registry reads files from /data/<mod id or datapack name>/flowstone/generators, files like the following example.

{
    "replace": "minecraft:stone", // The block to be replaced
    "with": "minecraft:coal_ore", // The block to replace the above one with
    "chance": 0.01 // The replacement chance
}

This way, through datapacks, one can easily extend Flowstone to, for instance, account for modded ores.

Datapacks

Flowstone offers three built-in datapacks to enable/disable to add or remove generation options.

• Overworld Ores (enabled by default) adds a 1%-per-ore chance for lava flowing over water to generate an overworld ore instead of stone.

• Crying Obsidian (disabled by default) adds a 25% chance for water flowing over a lava source to generate crying obsidian instead of obsidian.

• Netherrack and Nether Ores (enabled by default) adds a chance for lava flowing over soul soil (and near blue ice) to generate, instead of basalt, netherrack with a 100% chance, nether gold and quartz ore with 10% each, and ancient debris with a 1% chance.

Plus, these datapacks offer good examples on how to create more.