Mods for ores and resources for Minecraft 1.12.2 Forge

Mod The Beneath significantly diversifies your familiar game world. The mod will add the ability to teleport in the dark. You can easily navigate the dimension teeming with mobs, although this is a dangerous adventure that only a true warrior and hero of this world of minecraft games can go through.

This is something in between a library and a mod, this mod is used as a library for the ContentTweaker mod (allows you to add your own blocks), and this mod is used to add simple materials to the game, that is, in a couple of clicks - new ore, dust, ingot, gear from no, well, a nugget.