Where to Find Sillimanite in the United States
17 mapped sillimanite spots across 9 U.S. states. Sillimanite 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 sillimanite across the United States, with 17 mapped spots
Top states for sillimanite
States ranked by number of sillimanite spots in our database. States in bold link to a focused sillimanite-in-state list.
Every sillimanite spot we track
Sorted by state and county. Coordinates open in Google Maps.
Sillimanite rockhounding FAQ
Where is the best place to find sillimanite in the U.S.?+
Georgia, South Carolina, Alabama have the highest concentrations of sillimanite in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many sillimanite rockhounding spots does RockHoundR track?+
17 mapped spots across 9 states. The app keeps these on a map alongside your private finds.
Can I legally collect sillimanite on public land?+
Casual hand collecting of common rocks and minerals like sillimanite 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 sillimanite in the field?+
Field identification of sillimanite 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 sillimanite on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
