Map of Hornblende Locations in USA

Are you looking to go rockhounding for Hornblende? The United States offers 2 documented locations where you can find Hornblende. Explore our interactive map below to discover the best public dig sites, mines, and natural occurrences across the country.

Before heading out to these locations, ensure you verify land ownership rules and have the appropriate tools for extracting Hornblende. Always follow Leave No Trace principles when collecting.