Martian soil is the fine regolith found on the surface of Mars. Its properties can differ significantly from those of terrestrial soil, including its toxicity due to the presence of perchlorates. The term Martian soil typically refers to the finer fraction of regolith.
Martian soil simulant is a really important tool for researching Mars missions. It was developed by NASA based on data obtained by the Mars rovers and the orbiters. This composition is as close to the material on Mars.