Amends the Mineral Leasing Act for Acquired Lands to add a statutory definition of “hardrock mineral” and to treat hardrock minerals as a category subject to the Act’s leasing provisions. The change lists which minerals count as hardrock (for example, base and precious metals, gemstones) and explicitly excludes others (coal, oil, gas, sulfur, etc.).

This is a targeted, technical change to statutory definitions and to the list of minerals covered by the leasing framework for acquired federal lands; it does not itself appropriate funds or establish new programs, but it could change how hardrock extraction on acquired lands is authorized and administered (leasing vs. other authorities).