Space Resource Tech makes high-fidelity regolith simulants. What does that mean? They make simulated materials that mimic the exact characteristics of soils, dirt, and rocks found on extra terrestrial bodies. SRT makes regolith simulants of the moon, Martian, and asteroid soils so that researchers, developers, and space programs can test their equipment to see if it will operate in those conditions without having problems.

Even more fun, you can buy some of this yourself