What are most common condition for reduction of hematite to magnetite?

I found that hydrogen can reduce $\ce{Fe2O3}$ to $\ce{Fe3O4}$ under anaerobic conditions, but since I dont have $\ce{H2}$ in my lab what should I use to convert hematite into magnetite? and what conditions are used - temperature, pressure, partial pressure of oxygen and other important factors.
[![enter image description here](https://i.stack.imgur.com/WjyWa.jpg)](https://i.stack.imgur.com/WjyWa.jpg)


