Where to Find Biotite in Utah

9 mapped biotite rockhounding spots in Utah, across 7 counties. Most of the mapped spots sit in Millard County, Salt Lake County, and Beaver County. Biotite is reported at multiple rockhounding spots across the United States. Utah has several well-known rockhounding areas close enough to build a trip around: Topaz Mountain, the Dugway geode beds, the San Rafael Swell, and the trilobite beds near Delta.

Biotite by county in Utah

Counties ranked by number of biotite spots in our database.

Every biotite spot in Utah

Sorted by county. Coordinates open in Google Maps. Click a row for details.

Spot	County	Minerals	Coordinates	Access
San Francisco MountainsEly Highway	Beaver County	Diopside Fluorite Galena Garnet Pyrite Scheelite Sphalerite Apatite +7 more	38.4591, -113.3067	Public
Antelope IslandMountain View Trail	Davis County	Garnet Azurite Biotite Chlorite Chrysocolla Epidote Limonite Magnetite +4 more	40.9831, -112.1977	Public
Iron Peak	Iron County	Andesite Augite Biotite Chlorite Magnetite	37.9125, -112.6907	Public
Amasa Valley	Millard County	Albite Biotite Diopside Garnet Gold Idocrase Molybdenite Pyrite +4 more	39.1845, -113.3728	Public
Twin Peak	Millard County	Andesine Apatite Augite Biotite Magnetite	38.7841, -112.7329	Public
Arthur's Fork	Morgan County	Biotite Monazite Molybdenite Uraninite Xenotime	40.9347, -111.7509	Public
MarysvilleWest Bullion Avenue	Piute County	Cinnabar Alunite Albite Biotite Calcite Chlorite Pyrolusite Barite +6 more	38.4494, -112.2304	Public
AltaFlagstaff Mountain Trail	Salt Lake County	Apatite Biotite Barite Cerussite Limonite Rhodochrosite Galena Magnetite +9 more	40.5966, -111.6374	Public
Little CottonwoodLittle Cottonwood Road	Salt Lake County	Apatite Alunite Biotite Hornblende Magnetite Microcline Feldspar Pyrite +5 more	40.5702, -111.7135	Public

Biotite in Utah FAQ

Where can I find biotite in Utah?+

RockHoundR tracks 9 biotite spots in Utah, spread across 7 counties. The strongest concentration is in Millard County.

Is collecting biotite legal in Utah?+

Casual hand collection of common rocks and minerals like biotite is allowed on most BLM and U.S. Forest Service land in Utah, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always confirm rules before a trip.

What is the best biotite location in Utah?+

Millard County has the most biotite spots in our database for Utah. The full county breakdown is below, and different counties produce different qualities and varieties.

Other states for biotite

Biotite in Maine6

Other minerals to find in Utah

Hunt biotite in Utah on the map

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