Rock Zero has developed innovative processes for extracting critical materials from hardrock minerals that avoids high temperature ore roasting steps and recycles all process inputs. Our technology produces critical materials used in various industries from hardrock minerals in a closed loop chemical process that operates at low temperatures (<100 °C) and recycles both the process reagent and water. By avoiding the high-temperature (>1000 °C) roasting steps and recycling the process reagent, this process enables critical material extraction from hardrock minerals with less energy, fewer CO2 emissions, and no undesirable waste streams.