Where to Find Biotite
32 mapped biotite spots across 14 regions in 2 countries. Pick a region for its local guide, or browse every spot below. Biotite is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Every mapped biotite spot
Best spotJackson Co. Iron Mine dumpsJackson County, WisconsinPublic access · Actinolite, Almandine, Andalusite +4
Best spotBenningtonBennington County, VermontPublic access · Blue Quartz, Garnet, Feldspar +2
Best spotPowell KyaniteIron County, WisconsinPublic access · Kyanite, Staurolite, Almandine +2
Best spotMarysvillePiute County, UtahPublic access · Cinnabar, Alunite, Albite +11- Best spotTunk MountainHancock County, MainePublic access · Smoky Quartz, Feldspar, Hornblende +1
Lyon MountainClinton County, New YorkPublic access · Aegirine, Albite, Apatite +15- AltaSalt Lake County, UtahPublic access · Apatite, Biotite, Barite +14
- San Francisco MountainsBeaver County, UtahPublic access · Diopside, Fluorite, Galena +12
- HaveySagadahoc County, MainePublic access · Albite, Almandine Garnet, Beryl +10
Little CottonwoodSalt Lake County, UtahPermission required · Apatite, Alunite, Biotite +10- Amasa ValleyMillard County, UtahCheck locally · Albite, Biotite, Diopside +9
- Antelope IslandDavis County, UtahPermission required · Garnet, Azurite, Biotite +9
- Balsam Gap MineJackson County, North CarolinaPublic access · Magnesite, Albite, Allanite +7
- Moosup RiverProvidence County, Rhode IslandPublic access · Epidote, Hornblende, Orthoclase +7
- Porcupine Hill QuarrySagadahoc County, MainePublic access · Albite, Almandine Garnet, Beryl +6
- General AreaIron County, WisconsinPublic access · Almandite, Biotite, Kyanite +5
- PerkinsvilleWindsor County, VermontPublic access · Pyrite, Pyrrhotite, Chlorite +5
- Roberson RidgeHaywood County, North CarolinaPermission required · Ankerite, Apatite, Biotite +5
- Roebling MineWestern Connecticut Planning Region, ConnecticutPublic access · Aquamarine, Beryl, Biotite +5
- Singepole Mountain QuarryOxford County, MainePublic access · Almandine Garnet, Beryl, Biotite +5
- Smart Mine (Miller Property)Renfrew County, OntarioPermission required · Apatite, Titanite, Zircon +4
- Arthur's ForkMorgan County, UtahPublic access · Biotite, Monazite, Molybdenite +2
- Black MountainCatron County, New MexicoPermission required · Albite, Amethyst, Biotite +2
- CullodenMonroe County, GeorgiaPublic access · Mica, Muscovite, Biotite +2
- Egan Chutes Provincial ParkHastings County, OntarioCheck locally · Nepheline, Sodalite, Biotite +2
- Iron PeakIron County, UtahPublic access · Andesite, Augite, Biotite +2
- Twin PeakMillard County, UtahPublic access · Andesine, Apatite, Augite +2
- Brasstown ChurchTowns County, GeorgiaPublic access · Sillimanite, Kyanite, Biotite +1
- Chestnut MountainBedford County, VirginiaPublic access · Garnet, Biotite, Quartz +1
- Front RoyalWarren County, VirginiaPublic access · Biotite, Quartz, Unakite +1
- Mica MountainLatah County, IdahoPublic access · Green Beryl, Biotite, Muscovite
- Unnamed Location (Melanite)Hot Spring County, ArkansasPublic access · Melanite, Nepheline, Biotite
Top regions for biotite
United States
30 spots · 13 regionsCanada
2 spots · 1 regionsBiotite rockhounding FAQ
Where is the best place to find biotite?+
Utah, Maine, Wisconsin have the highest concentrations of biotite in this list. Quality and access vary by area, so open the linked region pages for a detailed view.
How many biotite rockhounding spots does RockHoundR track?+
32 mapped spots across 14 regions in 2 countries. The app keeps these on a map alongside your private finds.
Can I legally collect biotite on public land?+
In the U.S., casual hand collecting of common rocks and minerals like biotite 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. Rules differ by country and region, so always check with the managing agency before a trip.
How do I identify biotite in the field?+
Field identification of biotite 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 biotite on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
