Helium-3

Chemical formula He-3. Helium-3 is a light, stable isotope of helium and was the focus of 22nd century mining across the Earth's Moon lunar surface. Once commonly found as a result of tritium decay, it is now a sought after natural element since the demand for tritium as a fleet carrier fuel has increased.

— In-Game Description

Helium-3 is a Chemical Commodity. It is produced exclusively through Surface Mining, and as such, is rare and highly valuable. It is consumed by some Industrial markets.