### Question
How is the "critical mineral" defined?


### Answer
The term **critical mineral** is defined in *30 U.S.C. § 1606* as follows -

> any mineral, element, substance, or material designated as critical by the Secretary under subsection (c)

#### Citation:
  - *30 U.S.C. § 1606*
  - Heading: **CHAPTER 28-MATERIALS AND MINERALS POLICY, RESEARCH, AND DEVELOPMENT**

