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Description of your suggestion.

I also use another mod- This Rocks! https://modrinth.com/mod/this-rocks, because it also adds a lot of nice ground decorations. EarlyStage does not seem to add its own rocks and flints to some modded biomes, but the other one does. It would be awesome to have some sort of compatibility where pairs of stone splitters from This Rocks! could be combined to craft rocks for EarlyStage.

I made a small datapack to handle this for myself with tags but its very rudimentary and already improved the experience for me so I thought to share the idea because it might be useful for other players too.