https://www.vice.com/en_us/article/dypb5a/simulant-is-the-boom-industry-of-the-new-space-age

There has never been a better time to be in the market for some high-quality fake space dirt. As humans dream of new missions beyond our planet, the demand for simulants—materials designed to mimic alien surfaces, like those on Moon, Mars, and even unexplored worlds—is skyrocketing. 

These ersatz extraterrestrial soils have been around since the dawn of the space age, but a new rush of commercial, governmental, and scientific interest in interplanetary exploration is fueling a dazzling proliferation of recipes and options. Some of the most accurate simulants are extremely dangerous to handle, as off-Earth environments often contain hazardous chemicals and abrasive materials. For this reason, companies, nonprofits, and research institutions concoct different varieties of fake soil, tailored for use by everyone from rocket scientists to schoolchildren.