U.S. GAO - Hardrock Mining: Updated …
All metallic ore minerals and industrial minerals other than common variety minerals (e.g., stone, gravel, clay, sand) Gross revenue with reference price. Rate determination: Statutory minimum, lease-specific. Current rate and base: Market royalty rate; at least 2% of gross value of all minerals produced and sold determined by published price quotation (or, where unavailable, appraisal of fair ...