Mining is fundamental to exploit an extensive range of products used in a variety of technologies in everyday life. As a result of their continuous extraction, most of the highly concentrated, superficial, and easily accessible ore deposits have been almost or entirely depleted by now. Moreover, to fulfill the needs and challenges of our society, such as green technology, renewable energies, microelectronics, and telecommunications, materials require a variety of specific elements whose global distribution is uneven and whose reserves in primary deposits are limited. These are known as “strategic elements,” and are defined by their high economic importance and vulnerability to supply disruption.