Emerald Seeds
This item is similar to the vanilla potion item, but you'll get tons of positive effects and nausea too...
Recipes
For the normal potion you need 1 golden apple, 1 Emerald Apple, 2 Emerald Rods, 1 emerald, 1 Emerald Dust and 1 glass bottle.
To craft splash potion you need the Emerald Potion and gunpowder.