What is how to make diamond in little alchemy?

To make Diamond in Little Alchemy, you generally need to combine the right amounts of high pressure and carbon over time. Here's the typical path:

1. Start with Earth.
2. Combine Earth with Fire to make Lava.
3. Combine Lava with Earth to create Stone.
4. Combine Fire with Stone to get Metal.
5. Combine Earth with Pressure to make Coal. To make Pressure, you need Earth and Earth to make Land, then combine Land and Land to make Continent, then Continent and Continent to make Planet, finally Planet and Water makes Life
6. Combine Coal and Pressure to create Diamond.