Where to Find Hornblende in the United States
16 mapped hornblende spots across 11 U.S. states. Hornblende is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Map showing where to find hornblende across the United States, with 16 mapped spots
Top states for hornblende
States ranked by number of hornblende spots in our database. States in bold link to a focused hornblende-in-state list.
Every hornblende spot we track
Sorted by state and county. Coordinates open in Google Maps.
Hornblende rockhounding FAQ
Where is the best place to find hornblende in the U.S.?+
North Carolina, Utah, Vermont have the highest concentrations of hornblende in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many hornblende rockhounding spots does RockHoundR track?+
16 mapped spots across 11 states. The app keeps these on a map alongside your private finds.
Can I legally collect hornblende on public land?+
Casual hand collecting of common rocks and minerals like hornblende is allowed on most BLM and U.S. Forest Service land, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always check with the managing agency before a trip.
How do I identify hornblende in the field?+
Field identification of hornblende comes down to color, hardness, fracture, and luster. The RockHoundR app links to geology details for each spot to help narrow down what you might be picking up.
Hunt hornblende on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
