How do I unlock the stone category in Little Alchemy 2?

In Little Alchemy 2, the Stone category is not something you "unlock" in the traditional sense. Instead, you create the Stone element by combining specific ingredients. Once you create Stone, it will be added to your collection, and you can use it to create other elements.

HereÔÇÖs how to make Stone:

1. Start with Earth (one of the basic elements you begin with).
2. Combine Earth with Fire to create Lava.
3. Combine Lava with Air to create Stone.

So, the steps are:
- Earth + Fire = Lava
- Lava + Air = Stone

Once you have Stone, it will be added to your collection, and you can use it to create other elements like Sand, Clay, Statue, and more.

If youÔÇÖre looking to track your progress, you can always check your encyclopedia to see which elements youÔÇÖve discovered and which ones youÔÇÖre missing. The Stone category will appear once youÔÇÖve successfully created the Stone element.