Made in mind with the mod, "Tektopia" because that mod requires LOTS of emeralds.
This mod adds 2 new dimensions: The Emerald Dimension, and the SUPER Emerald Dimension.
The Emerald Dimension is made with Iron Blocks, and it is filled with Emerald Ore.
The SUPER Emerald Dimension is made with Emerald Blocks, and is filled with Emerald Blocks.
Again, this mod is REALLY useful when you play the Tektopia Mod.