NASA scientists working in California’s Mojave Desert have discovered topaz on a volcanic outcrop — a mineral signature that could point to a major porphyry copper deposit hidden beneath the surface. Copper is a critical mineral for US electronics, defense systems, and the electric grid, and America has been racing to secure domestic supplies. Researchers say the discovery could open the door to further exploration in the region. While much more analysis is needed, experts say findings like this highlight how space-agency tools are now being turned toward solving America’s mineral supply challenges at home.
