Montana, USA

Mineral list contains entries from the region specified including sub-localities


Mineral List:

Acanthite Ag   2 S Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Aegirine NaFe 3+   [Si   2 O   6 ] Reference: [Jay Ellis Ransom,1974,Gems and Minerals of America] Andalusite Al   2 [O|SiO   4 ] Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] 'Apatite' Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Arsenopyrite FeAsS - (Fe   0.90 Co   0.10 )AsS Reference: [Jay Ellis Ransom,1974,Gems and Minerals of America] Augite (Ca,Na)(Mg,Fe 2+   ,Al,Fe 3+   ,Ti)[(Si,Al)   2 O   6 ] Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Augite var: Fassaite Reference: [AmMin 42:115] Baotite Ba   4 (Ti,Nb)   8 Si   4 O   28 Cl Reference: [AmMin 47:987] 'Bentonite' Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Beryl Be   3 Al   2 Si   6 O   18 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Calcite CaCO   3 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Carter Co., Montana, USA © Mario Pauwels Cassiterite SnO   2 Reference: [Jay Ellis Ransom,1974,Gems and Minerals of America] 'Chalcedony' Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] 'Chalcedony var: Agate' SiO   2 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Big Horn Co., Montana, USA © Jorge M. Alves 'Chalcedony var: Fortification Agate' Reference: [] 'Chalcedony var: Landscape Agate' Reference: [] 'Chalcedony var: Moss Agate' Reference: [Rocks&Min. 17:238.] 'Chalcedony var: Onyx' SiO   2 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] 'Chalcedony var: Petrified Wood' Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Chesterite (Mg,Fe)   17 Si   20 O   54 (OH)   6 Reference: [http://webmineral.com/data/Chesterite.shtml] Chromite FeCr   2 O   4 Reference: [Jay Ellis Ransom,1974,Gems and Minerals of America] Chrysotile Mg   3 Si   2 O   5 (OH)   4 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Clinoclase Cu   3 [(OH)   3 |AsO   4 ] Reference: [Rob Lavinsky specimen] Missoula Co., Montana, USA © Rob Lavinsky 'Coal var: Bituminous Coal' Reference: [Jay Ellis Ransom,1974,Gems and Minerals of America] 'Coal var: Lignite' Reference: [Field Book of Common Rocks and Minerals- Fredrick Brewster Loomis-1948] Corundum Al   2 O   3 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Gallatin Co., Montana, USA © 2002 John H. Betts Corundum var: Ruby Al   2 O   3 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Corundum var: Sapphire Al   2 O   3 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Diamond C Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Dumortierite (Al,Fe 3+   )   7 [O   3 |BO   3 |(SiO   4 )   3 ] Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] 'Emery' Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Euxenite-(Y) (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)   2 O   6 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] 'Fergusonite' Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Fluorite CaF   2 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Galena PbS Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] 'Garnet Group' X   3 Z   2 (TO   4 )   3 (X = Ca, Fe, etc·, Z = Al, Cr, etc·, T = Si, As, V) Reference: [Jay Ellis Ransom,1974,Gems and Minerals of America] Gold Au Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Powell Co., Montana, USA   Gypsum Ca[SO   4 ] · 2H   2 O Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Kyanite Al   2 [O|SiO   4 ] Reference: [] Magnetite Fe 2+   Fe 3+ 2 O   4 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Malachite Cu   2 [(OH)   2 |CO   3 ] Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Melanterite var: Cuprian Melanterite (Fe,Cu)SO   4 ·7H   2 O Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Metatyuyamunite Ca(UO   2 )   2 [VO   4 ]   2 · 3-5H   2 O Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Muscovite KAl   2 [(OH)   2 |AlSi   3 O   10 ] Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Narsarsukite Na   2 (Ti,Fe)Si   4 (O,F)   11 Reference: [AmMin 20:598] Natrolite Na   2 [Al   2 Si   3 O   10 ] · 2H   2 O Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Opal SiO   2 ·nH   2 O Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Montana, USA © J.N Opal var: Wood Opal Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Pyrite FeS   2 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Pyrolusite MnO   2 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Pyromorphite Pb   5 [Cl|(PO   4 )   3 ] Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Pyrophyllite Al   2 Si   4 O   10 (OH)   2 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Quartz var: Chert Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Quartz var: Jasper Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Quartz var: Rock Crystal Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Quartz var: Smoky Quartz SiO   2 Reference: [Jay Ellis Ransom,1974,Gems and Minerals of America] Montana, USA © Rob Lavinsky 'Serpentine Group' D   2 [Si   2 O   5 ](OH)4 + or - nH   2 O Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Sillimanite Al   2 [O|SiO   4 ] Reference: [] Spinel MgAl   2 O   4 Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Synchysite-(Y) Ca(Y,Ce)[F|(CO   3 )   2 ] Reference: [Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 288.] Thortveitite (Sc,Y)   2 [Si   2 O   7 ] Reference: [Parker & Havens (1963) U.S. Geological Survey Professional Paper 475-B: B10-B11; Foord, Eugene E. et al (1993) Canadian Mineralogist: 31: 337-346.] Topaz Al   2 [(F,OH)   2 |SiO   4 ] Reference: [Jay Ellis Ransom,1974,Gems and Minerals of America] Tyuyamunite Ca(UO   2 )   2 [VO   4 ]   2 · 5-8H   2 O Reference: [Jay Ellis Ransom,1974, Gems and Minerals of America] Carbon Co., Montana, USA © Chris Tucker

63 entries listed. 39 valid minerals.

Localities in this Region:


57 localities of a total of 7829 localities shown. Additional sublocalities are indicated by the green plus sign(+).

USA   Montana Beaverhead Co.+ Big Horn Co.+ Blaine Co.+ Broadwater Co.+ Carbon Co.+ Carter Co.+ Cascade Co.+ Chouteau Co.+ Custer Co.+ Daniels Co.+ Dawson Co.+ Deer Lodge Co.+ Fallon Co.+ Fergus Co.+ Flathead Co.+ Gallatin Co.+ Garfield Co.+ Glacier Co.+ Golden Valley Co.+ Granite Co.+ Hill Co.+ Jefferson Co.+ Judith Basin Co.+ Lake Co.+ Lewis and Clark Co.+ Liberty Co.+ Lincoln Co.+ Madison Co.+ McCone Co. Meagher Co.+ Mineral Co.+ Missoula Co.+ Musselshell Co. Park Co.+ Petroleum Co. Phillips Co.+ Pondera Co.+ Powder River Co.+ Powell Co.+ Prairie Co. Ravalli Co.+ Richland Co.+ Roosevelt Co.+ Rosebud Co.+ Sanders Co.+ Sheridan Co.+ Silver Bow Co.+ Stillwater Co.+ Sweet Grass Co.+ Teton Co.+ Toole Co.+ Treasure Co.+ Valley Co.+ Wheatland Co. Wibaux Co.+ Yellowstone Co.+

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!

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