Interlune has developed a prototype machine for extracting helium-3 from lunar soil and has already signed two sales agreements: one with the U.S. Department of Energy (DOE) and another with quantum technology company Maybell Quantum.
The company claims it will begin supplying helium-3 to its clients by 2029, and each kilogram (~2.2 lbs) will cost a whopping US$20 million. One kilogram of helium-3 occupies a volume of roughly 7,400 liters of the gas when measured at standard temperature and pressure.