This is moving to https://minecraft.curseforge.com/projects/underground-biomes now. This page will not be updated anymore, and may get deleted in the future. Release 1.3.1 has moved to that page.
(This will get improved soon)
This mod basically adds 24 different kind of stones, with modded ore support, and variants like button, slabs, bricks, etc...
But unfortunately this mod was abandoned 2 times by Zeno410, whose mod was taken back by kyeiti, which, since a little while, has been inactive too, keeping some major bugs and missing features out of the question.
So, I decided to continue this, as allowed by the license.
This is now compatible with way more mods, like native ore support for GrowthCraft & NuclearCraft while also supporting OTG / RTG (Cobble UB-ing) and BOP's Overgrown Stone, and way more is currently planned.
Feel free to ask for features / native mod's ores support / etc
You can use curse, github or discord to contact me.
Original mod page : https://minecraft.curseforge.com/projects/underground-biomes