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Maine, USAi
Regional Level Types
MaineState
USACountry

This page kindly sponsored by Maine Mineralogical and Geological Society
Key
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Neighbouring regions:
Locality type:State
Largest Settlements:
PlacePopulation
Portland66,881 (2018)
Lewiston36,202 (2017)
Bangor32,391 (2017)
West Scarborough27,706 (2017)
South Portland25,556 (2017)
South Portland Gardens23,893 (2017)
Museums in region:


Deposits of rare-element-bearing and gem-bearing granite pegmatites are well-known in Oxford, Androscoggin, and Sagadahoc Counties in the southwest portion of the State. These pegmatites were formerly noted for ceramic-grade feldspar production along with beryl and sheet muscovite. There are many lithium- and cesium-enriched LCT pegmatites in the Oxford County and Androsoggin County Field. In Sagadahoc County, Li- or Cs-enriched LCT granite pegmatites are uncommon and there are some NYF pegmatites, present. Additional granite pegmatites occur in Cumberland County and scattered in other areas. Additional deposits include small generally low-grade lead-zinc-copper sulfide deposits along the coastal region with a few important sulfide deposits in the eastern part of the coastal region and several larger high-grade deposits in the north central part of the state ranging from Oxford, Franklin, Somerset, Piscataquis, and Aroostook Counties. Large low-grade manganese silicate deposits are present in Aroostook County. Granite quarries are widespread in the southern portion of the State including coastal regions. High grade slate is still quarried in the Monson District. Lime-grade marble is still quarried in the Thomaston District. Much of the State is composed of metamorphic and plutonic igneous rocks, with relatively few sedimentary rocks.

Maine towns and similar lands are all named. Formal local governments range from towns and cities with local jurisdiction to plantations and townships which have State oversight. Many townships have numerical and acronym abbreviations. Surveying of townships occurred sporadically and grid systems were developed as "wild land" was offered for sale. The grids are township and ranges, abbreviated "T" and "R". Due to the historical need for surveyed land, townships were re-named as needed, each survey frequently having T1 R1 as the starting point, although a few townships were named alphabetically. Usually, townships were quickly organized and residents applied for local self-government and each town received a new name. Townships that did not have sufficient population to establish a local government remained unorganized. The resulting series of surveys left many pieces of land with similar township and range designations. Suffixes were developed to distinguish these otherwise duplicating designations. One of the wealthiest men in the USA, William Bingham [March 8, 1752 – February 7, 1804], who was also an important financier of the American Revolution, invested a great deal of money in Maine lands, as did his brother-in-law, Alexander Baring. Because Bingham owned so much of Maine, about 11% at one time, the townships were coded according to their location. BPP indicated "Bingham's Penobscot Purchase", while BKP indicated "Bingham's Kennebec Purchase". Additional abbreviations, EKR and WKR, mean "East of the Kennebec River" and "West of the Kennebec River". As Bingham's lands were among the first in Maine to be surveyed into new townships, subsequent surveyors based their work on that of previous surveyors, designations such as WBKP or NBKP were used by Maine to indicate "West of Bingham's Kennebec Purchase" or "North of Bingham's Kennebec Purchase", while NBPP indicates "North of Bingham's Penobscot Purchase". Additional abbreviations include ED, MD, ND, and SD, signifying compass directions - East, North, South or "Middle" and "Division": used when there was a need to be more specific regarding a large tract of land with difficult to code townships. NWP signifies land "North of the Waldo Patent" - a piece of land owned by Revolutionary War General Samuel Waldo. A few townships remain from the Titcomb Survey and are designated TS. A few townships were grants to aid some cause, usually a school, Bowdoin College, Days Academy, etc., although canal grants were intended to help finance public works canal projects to improve commercial transportation. By far. most of the townships have the suffix WELS - "West of the Easterly Line of the State", which merely indicates the North-South surveyed border between Maine and New Brunswick.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

367 valid minerals. 10 (TL) - type locality of valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc. 39 erroneous literature entries.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Acanthite
Formula: Ag2S
Localities: Reported from at least 6 localities in this region.
Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Localities: Reported from at least 25 localities in this region.
Aegirine
Formula: NaFe3+Si2O6
Localities: Reported from at least 7 localities in this region.
Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Localities: Reported from at least 6 localities in this region.
Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
Albite
Formula: Na(AlSi3O8)
Localities: Reported from at least 290 localities in this region.
Albite var: Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Localities: Reported from at least 18 localities in this region.
Albite var: Cleavelandite
Formula: Na(AlSi3O8)
Localities: Reported from at least 84 localities in this region.
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Localities: Reported from at least 22 localities in this region.
Albite var: Peristerite
Formula: Na(AlSi3O8)
Albite var: Zygadite
Formula: Na(AlSi3O8)
Localities: Reported from at least 10 localities in this region.
'Albite-Anorthite Series'
Localities: Reported from at least 6 localities in this region.
Allanite-(Ce)
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 10 localities in this region.
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Reference: O'Brian, William Desmond (2017) Formation of Rapakivi Feldspars in the deer Isle Granite Complex, Coastal, Maine: In Situ Lead Isotope and Trace Element Analysis, pp 101.
Allophane
Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v1.
Alluaudite ?
Formula: (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Reference: Tim Blake and Scott Soucey specimens
Almandine
Formula: Fe2+3Al2(SiO4)3
Localities: Reported from at least 280 localities in this region.
'Almandine-Spessartine Series'
Alunogen ?
Formula: Al2(SO4)3 · 17H2O
Description: post-mining efflorescence on pyrrhotite and not a true mineral of the locality.
Reference: King, V. and Foord, E. 1994, Mineralogy of Maine
Amblygonite
Formula: LiAl(PO4)F
Localities: Reported from at least 11 localities in this region.
Amblygonite var: Hebronite
Formula: LiAl(PO4)F
Reference: King & Foord, 1994. Mineralogy of Maine, V.1.; King, V. and Foord, E., 1994, Mineralogy of Maine.
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Localities: Reported from at least 8 localities in this region.
'Amphibole Supergroup var: Uralite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Analcime
Formula: Na(AlSi2O6) · H2O
Localities: Reported from at least 6 localities in this region.
Anatase
Formula: TiO2
Localities: Reported from at least 8 localities in this region.
Andalusite
Formula: Al2(SiO4)O
Localities: Reported from at least 29 localities in this region.
Andalusite var: Chiastolite
Formula: Al2(SiO4)O
Andradite
Formula: Ca3Fe3+2(SiO4)3
Anglesite
Formula: PbSO4
Anhydrite
Formula: CaSO4
Reference: King & Foord, 1994. Mineralogy of Maine, V.1.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Localities: Reported from at least 6 localities in this region.
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Localities: Reported from at least 74 localities in this region.
Anorthite
Formula: Ca(Al2Si2O8)
Localities: Reported from at least 23 localities in this region.
Anorthite var: Bytownite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
'Anorthoclase'
Formula: (Na,K)AlSi3O8
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Localities: Reported from at least 7 localities in this region.
Antigorite
Formula: Mg3(Si2O5)(OH)4
Localities: Reported from at least 8 localities in this region.
Antigorite var: Bowenite
Formula: Mg3(Si2O5)(OH)4
Reference: King & Foord, 1994. Mineralogy of Maine, V. 1., pp. 65-66.
'Apatite'
Localities: Reported from at least 18 localities in this region.
'Apatite var: Carbonate-rich Apatite'
Reference: Van King
'Apatite var: Collophane'
'Apophyllite'
Locality: Loring Cove, Perry, Washington Co., Maine, USA - erroneously reported
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v. 1; Morrill et al. 1958.
Aragonite
Formula: CaCO3
Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Arsenopyrite
Formula: FeAsS
Localities: Reported from at least 59 localities in this region.
'Asbestos'
'Asbestos var: Mountain Leather'
Astrophyllite
Formula: K2NaFe2+7Ti2Si8O28(OH)4F
Augelite
Formula: Al2(PO4)(OH)3
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Localities: Reported from at least 23 localities in this region.
Augite var: Ferroaugite
Reference: Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.
Augite var: Titanian Augite
Formula: (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Reference: King & Foord, 1994: Mineralogy of Maine, V.1
Aurichalcite
Formula: (Zn,Cu)5(CO3)2(OH)6
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Localities: Reported from at least 61 localities in this region.
Axinite-(Fe)
Formula: Ca2Fe2+Al2BSi4O15OH
'Axinite Group'
Azurite
Formula: Cu3(CO3)2(OH)2
Localities: Reported from at least 6 localities in this region.
Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Reference: King & Foord, 1994. Mineralogy of Maine, V. 1.
Barroisite
Formula: ☐{CaNa}{Mg3Al2}(AlSi7O22)(OH)2
Reference: Anderson, 1991. Maine Mineral Localities, 2nd ed.
Baryte
Formula: BaSO4
Localities: Reported from at least 6 localities in this region.
Bavenite
Formula: Ca4Be2Al2Si9O26(OH)2
Reference: King, V. and Foord, E., 1994, 2000, Mineralogy of Maine, V. 1., V.2
Beidellite
Formula: (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Reference: King & Foord, 1994. Mineralogy of Maine, V. 1.; King and Foord, 2000, Addenda to Volume 1, Mineralogy of Maine, v. 2.
Bementite
Formula: Mn7Si6O15(OH)8
Beraunite
Formula: Fe2+Fe3+5(PO4)4(OH)5 · 6H2O
Localities: Reported from at least 10 localities in this region.
Berlinite
Formula: AlPO4
Description: Found with cassiterite in an unspecified area "near Aurora" (Sid Williams, pers. Com., 1995). Specimen was a Phelps Dodge Company mineral exploration sample (more detailed location in their closed files).
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, volume 1.
Bermanite
Formula: Mn2+Mn3+2(PO4)2(OH)2 · 4H2O
Berthierine
Formula: (Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4
Reference: Wise, M. A. (2007). Crystallization of 'pocket' berthierine from the pulsifer granitic pegmatite, Poland, Maine, USA. Clays and Clay Minerals, 55(6), 583-592.
Bertrandite
Formula: Be4(Si2O7)(OH)2
Localities: Reported from at least 39 localities in this region.
Beryl
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 239 localities in this region.
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Localities: Reported from at least 59 localities in this region.
Beryl var: Caesium Beryl (FRL)
Formula: Be3Al2(Si6O18)
Type Locality:
Reference: S.L.Penfield (1888), Amer. J. Sci, ser.3 36, 317
Beryl var: Emerald
Formula: Be3Al2(Si6O18)
Locality: Topsham, Sagadahoc Co., Maine, USA - erroneously reported
Description: Emerald was a synonym for beryl in the 1790s when Vauquelin discovered that they were the same species. The usage of "emerald" continued in the scientific literature even until the 1830s. The cited reference merely copied out of date information. No beryl that would remotely be considered to be emerald has been found in the entire state of Maine, thus far.
Reference: E.Ya. Kievlenko ( 2003) Geology of gems, p. 79
Beryl var: Goshenite
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 16 localities in this region.
Beryl var: Heliodor
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 27 localities in this region.
Beryl var: Morganite
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 14 localities in this region.
Beryllonite (TL)
Formula: NaBePO4
Localities: Reported from at least 16 localities in this region.
Description: Very crystallographically rich beryllonite specimens are highly prized. Most crystals from this area are usually etched and many so-called terminated crystals are actually are showing perfect cleavage.
Reference: King, V. and Foord, E., 1994, 2000, Mineralogy of Maine.; Bastin, Edson Sunderland (1911) Geology of the pegmatites and associated rocks of Maine, including feldspar, quartz, mica, and gem deposits. USGS Bulletin 445.
Beudantite ?
Formula: PbFe3(AsO4)(SO4)(OH)6
Description: No reference.
'Biotite'
Localities: Reported from at least 205 localities in this region.
'Biotite var: Manganophyllite' ?
Description: Unnecessary name for relatively low Mn-bearing biotite with Fe>>Mn and which does not have a reddish brown color associated with the use of this varietal name.
Reference: Thompson, et al., 1991. Maine Mineral Localities, 2nd ed.
Birnessite
Formula: (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Reference: King & Foord, 1994. Mineralogy of Maine, p.63.
Bismuth
Formula: Bi
Localities: Reported from at least 8 localities in this region.
Bismuthinite
Formula: Bi2S3
Localities: Reported from at least 7 localities in this region.
Bismutite
Formula: (BiO)2CO3
'Bloodstone'
Formula: SiO2
Bornite
Formula: Cu5FeS4
Localities: Reported from at least 13 localities in this region.
Boulangerite
Formula: Pb5Sb4S11
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, volume 1.
Bournonite
Formula: PbCuSbS3
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, volume 1.
Braunite
Formula: Mn2+Mn3+6(SiO4)O8
'Bravoite'
Formula: (Fe,Ni)S2
Brazilianite
Formula: NaAl3(PO4)2(OH)4
Brochantite
Formula: Cu4(SO4)(OH)6
Brookite
Formula: TiO2
Calcite
Formula: CaCO3
Localities: Reported from at least 90 localities in this region.
Calcite var: Iceland Spar
Formula: CaCO3
Reference: Henry Minot
Cancrinite
Formula: (Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Carminite ?
Formula: PbFe3+2(AsO4)2(OH)2
Description: No reference.
Carnotite
Formula: K2(UO2)2(VO4)2 · 3H2O
Locality: Aroostook Co., Maine, USA - erroneously reported
Reference: Morrill & Hinckley, 1959. Maine Mines & Minerals, Vol. 2
Cassiterite
Formula: SnO2
Localities: Reported from at least 51 localities in this region.
Cerussite
Formula: PbCO3
Chalcocite
Formula: Cu2S
Localities: Reported from at least 8 localities in this region.
'Chalcodite'
Formula: K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Reference: Charles Guidotti, personal communication, 1991; King and Foord (1994) Mineralogy of Maine, vol. 1, p. 338
Chalcophanite
Formula: (Zn,Fe,Mn)Mn3O7 · 3H2O
Locality: Rumford, Oxford Co., Maine, USA - erroneously reported
Reference: Anderson, 1991. Maine Mineral Localities, 2nd ed.
Chalcophyllite
Formula: Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v1.
Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 57 localities in this region.
Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Localities: Reported from at least 23 localities in this region.
Chamosite var: Daphnite
Formula: (Fe,Mg)5Al(Si,Al)4O10(OH)8
'Chamosite-Clinochlore Series'
Localities: Reported from at least 13 localities in this region.
Childrenite
Formula: Fe2+Al(PO4)(OH)2 · H2O
Localities: Reported from at least 6 localities in this region.
Chlorargyrite
Formula: AgCl
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v. 1; Morrill et al. 1958.
'Chlorite Group'
Localities: Reported from at least 23 localities in this region.
Chromite
Formula: Fe2+Cr3+2O4
Localities: Reported from at least 6 localities in this region.
Chrysoberyl
Formula: BeAl2O4
Localities: Reported from at least 33 localities in this region.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Chrysotile
Formula: Mg3(Si2O5)(OH)4
'Cimolite'
Formula: Al4Si9O24 · 6H2O
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine.
Clarkeite
Formula: (Na,Ca,Pb)(UO2)O(OH) · 0-1H2O
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Localities: Reported from at least 23 localities in this region.
Clinochlore var: Pennine
Formula: Mg5Al(AlSi3O10)(OH)8
'Clinochrysotile'
Clino-suenoite
Formula: □{Mn2+2}{Mg5}(Si8O22)(OH)2
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 22 localities in this region.
Cobaltite
Formula: CoAsS
Locality: Kellys Cove, Northport, Waldo Co., Maine, USA - erroneously reported
Description: The report is based on 'thin section" observation. The confirmation of the occurrence is lacking. No data are published. Cobaltite is not the most common cobalt sulfide known and the identification is improbable. Note: Recently the reference web page is no longer available.
Reference: www.dartmouth.edu/~cehs/ArsenicConference/Reeve.html
Collinsite
Formula: Ca2Mg(PO4)2 · 2H2O
Reference: Peter Cristofono collection, 2018; ex. Ingeborg Burggraf
Columbite-(Fe)
Formula: Fe2+Nb2O6
Localities: Reported from at least 63 localities in this region.
'Columbite-(Fe)-Columbite-(Mn) Series'
Localities: Reported from at least 13 localities in this region.
Columbite-(Mn)
Formula: Mn2+Nb2O6
Localities: Reported from at least 21 localities in this region.
'Columbite-(Mn)-Tantalite-(Mn) Series'
Reference: If both species are here so is the series. Needed for unanalysed specimens.
'Columbite-Tantalite'
Cookeite (TL)
Formula: (Al2Li)Al2(AlSi3O10)(OH)8
Localities: Reported from at least 31 localities in this region.
Habit: Radial clusters of tightly grown platy crystals. The clusters show the typical arrangement of chlorite group minerals.
Colour: White to clear when pure. Also found pale yellow, pale, green, or pale pink.
Reference: King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
Copiapite
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Copper
Formula: Cu
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Localities: Reported from at least 9 localities in this region.
Correianevesite
Formula: Fe2+Mn2+2(PO4)2 · 3H2O
Description: Correianevesite is the unoxidized equivalent to landesite for which the Berry-Havey Quarry is the type locality. Complete chemical analysis of what is now correianevesite was made by Ian Steele of the University of Chicago in 2002 (unpublished), but a crystal structure refinement was not made to propose a new species at that time.
Reference: Moore, P. B., Araki, T., Kampf, A. R. (1980): Nomenclature of the phosphoferrite structure type: refinements of landesite and kryzhanovskite. Mineralogical Magazine, 43, 789-795. King, V. and Foord, E., 1994, 2000, Mineralogy of Maine.
Corundum
Formula: Al2O3
Covellite
Formula: CuS
Crandallite
Formula: CaAl3(PO4)(PO3OH)(OH)6
Cryptomelane
Formula: K(Mn4+7Mn3+)O16
Localities: Reported from at least 15 localities in this region.
Cubanite
Formula: CuFe2S3
Cummingtonite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Localities: Reported from at least 6 localities in this region.
Cuprite
Formula: Cu2O
'Cymatolite'
Darrellhenryite
Formula: Na(LiAl2)Al6(BO3)3Si6O18(OH)3O
Reference: Roda-Robles, E., Simmons, W., Pesquera, A., Gil-Crespo, P. P., Nizamoff, J., & Torres-Ruiz, J. (2015). Tourmaline as a petrogenetic monitor of the origin and evolution of the Berry-Havey pegmatite (Maine, USA). American Mineralogist, 100(1), 95-109.
Datolite
Formula: CaB(SiO4)(OH)
'Deweylite'
Formula: Mg4Si3O10 · 6H2O ?
Reference: King & Foord, 1994. Mineralogy of Maine, V.1.; King, V. and Foord, E. (1994) Mineralogy of Maine
Diadochite
Formula: Fe3+2(PO4)(SO4)(OH) · 5H2O
Localities: Reported from at least 13 localities in this region.
Diaspore
Formula: AlO(OH)
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v.1.
Dickinsonite-(KMnNa)
Formula: {KNa}{Mn2+◻}{Ca}{Na3}{Mn2+13}{Al}(PO4)12(OH)2
Localities: Reported from at least 11 localities in this region.
Diopside
Formula: CaMgSi2O6
Localities: Reported from at least 37 localities in this region.
Diopside var: Diallage
Formula: CaMgSi2O6
Reference: Morrill & Hinckley, 1959. Maine Mines & Mineral Localities, Vol. 2.
'Diopside-Hedenbergite Series'
Dolomite
Formula: CaMg(CO3)2
Localities: Reported from at least 13 localities in this region.
Dravite
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 9 localities in this region.
Dumortierite
Formula: (Al,Fe3+)7(SiO4)3(BO3)O3
Localities: Reported from at least 24 localities in this region.
Earlshannonite
Formula: Mn2+Fe3+2(PO4)2(OH)2 · 4H2O
Edenite
Formula: {Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Reference: King & Foord, 1994. Mineralogy of Maine, V 1, p.113
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 44 localities in this region.
Eleonorite
Formula: Fe3+6(PO4)4O(OH)4 · 6H2O
Enargite
Formula: Cu3AsS4
Reference: King & Foord, 1994. Mineralogy of Maine, V. 1.; Seal, R.R., II, Foley, N.K., Haffner, D.P., and Meier, A., 1998, Environmental geochemistry of surface and ground waters around the Bald Mountain massive sulfide deposit, northern Maine: natural backgrounds from a mineralized, but unmined area [abs.]: Geological Society of America, Abstracts with Programs, v. 30, p. A128.
Enstatite
Formula: MgSiO3
Localities: Reported from at least 6 localities in this region.
Enstatite var: Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
Reference: Houston, Robert S., 1956, Genetic Study of Some Pyrrhotite Deposits of Maine and New Brunswick, Department of Development of Industry and Commerce, Augusta, Maine, pp. 117 + 6 plates.
Eosphorite
Formula: Mn2+Al(PO4)(OH)2 · H2O
Localities: Reported from at least 27 localities in this region.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 29 localities in this region.
Euclase
Formula: BeAl(SiO4)(OH)
Eucryptite
Formula: LiAlSiO4
Description: There is no eucryptite present at this locality, either as true eucryptite or as a mixture of quartz plus albite. The spodumene from this locality does have a pale red fluorescence, but this test is inadequate to verify eucryptite.
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v. 1.
Evansite ?
Formula: Al3(PO4)(OH)6 · 6H2O
Description: Reported in thin section by Sid Williams.
Reference: King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
Fairfieldite
Formula: Ca2Mn2+(PO4)2 · 2H2O
Localities: Reported from at least 21 localities in this region.
Falsterite
Formula: Ca2MgMn2+2Fe2+2Fe3+2Zn4(PO4)8(OH)4(H2O)14
Reference: Jim Nizamoff, pers. comm. Feb. 2012; Anthony R. Kampf, Stuart J. Mills, W.B. Simmons, James W. Nizamoff, and R.W. Whitmore (2012) Falsterite, A New Zinc-Bearing Secondary Phosphate From The Palermo #1 Mine, North Groton, New Hampshire. 39th Rochester Symposium abstracts
Fayalite
Formula: Fe2+2SiO4
Localities: Reported from at least 8 localities in this region.
'Fayalite-Forsterite Series'
Localities: Reported from at least 12 localities in this region.
'Feldspar Group'
Localities: Reported from at least 35 localities in this region.
'Feldspar Group var: Perthite'
Localities: Reported from at least 12 localities in this region.
Ferberite
Formula: FeWO4
Fergusonite-(Y)
Formula: YNbO4
Reference: King & Foord, 1994. Mineralogy of Maine, V. 1.; King and Foord, 2000, Addenda to Volume 1, Mineralogy of Maine, v. 2.
Ferrimolybdite
Formula: Fe2(MoO4)3 · nH2O
Ferrisicklerite
Formula: Li1-x(Fe3+xFe2+1-x)PO4
Reference: GUIDEBOOK 1 Mineral Collecting in the Maine Pegmatite Belt Prepared by members of Maine Federation Club 1972 pg 20-21
Ferro-edenite
Formula: {Na}{Ca2}{Fe2+5}(AlSi7O22)(OH)2
Reference: Wiebe et al., Journal of Petrology 38:393-423
Ferro-hornblende
Formula: ☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Ferro-pargasite
Formula: {Na}{Ca2}{Fe2+4Al}(Al2Si6O22)(OH)2
Reference: King & Foord, 1994. Mineralogy of Maine, V. 1.
Ferrosilite
Formula: FeSiO3
Ferrostrunzite
Formula: Fe2+Fe3+2(PO4)2(OH)2 · 6H2O
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed), 2000, Mineralogy of Maine, V. 2.
Fluorapatite
Formula: Ca5(PO4)3F
Localities: Reported from at least 132 localities in this region.
Fluorapatite var: Carbonate-rich Fluorapatite
Formula: Ca5(PO4,CO3)3(F,O)
Localities: Reported from at least 17 localities in this region.
Fluorapatite var: Manganapatite
Formula: Ca5(PO4)3F
Localities: Reported from at least 7 localities in this region.
Fluorapatite var: Mn-bearing Fluorapatite
Formula: (Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Localities: Reported from at least 6 localities in this region.
Fluor-elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F
Reference: Roda-Robles, E., Simmons, W., Pesquera, A., Gil-Crespo, P. P., Nizamoff, J., & Torres-Ruiz, J. (2015). Tourmaline as a petrogenetic monitor of the origin and evolution of the Berry-Havey pegmatite (Maine, USA). American Mineralogist, 100(1), 95-109.
Fluorite
Formula: CaF2
Localities: Reported from at least 29 localities in this region.
Fluornatromicrolite
Formula: (Na1.5Bi0.5)Ta2O6F
Reference: King, V., and Foord, E., 2000, Mineralogy of Maine
Fluor-schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3F
Reference: Roda-Robles, E., Simmons, W., Pesquera, A., Gil-Crespo, P. P., Nizamoff, J., & Torres-Ruiz, J. (2015). Tourmaline as a petrogenetic monitor of the origin and evolution of the Berry-Havey pegmatite (Maine, USA). American Mineralogist, 100(1), 95-109.
Foitite
Formula: (□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OH
Localities: Reported from at least 10 localities in this region.
Forsterite
Formula: Mg2SiO4
Localities: Reported from at least 9 localities in this region.
Fourmarierite
Formula: Pb(UO2)4O3(OH)4 · 4H2O
Gahnite
Formula: ZnAl2O4
Localities: Reported from at least 19 localities in this region.
Gainesite (TL)
Formula: Na(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2O
Type Locality:
Reference: Amer.Min.(1983) 68, 1022-1028; "Mineralogy of Maine, Vol. 1" by King, V.T. & Foord, E.E., Maine Geologic Survey, 1994
Galena
Formula: PbS
Localities: Reported from at least 80 localities in this region.
Galena var: Argentiferous Galena
Formula: PbS
Ganophyllite
Formula: (K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
'Garnet Group'
Formula: X3Z2(SiO4)3
Localities: Reported from at least 19 localities in this region.
'Garnierite'
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v. 1.
Gedrite
Formula: ☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Gehlenite
Formula: Ca2Al(AlSiO7)
Description: An obviously improbable species in a granite pegmatite or its schist host rocks. Typographical error or slip of the pen for gahnite?
Reference: Bastin, Edson Sunderland (1911) Geology of the pegmatites and associated rocks of Maine, including feldspar, quartz, mica, and gem deposits. USGS Bulletin 445.
Gersdorffite
Formula: NiAsS
Reference: Rainville, G. D. and Park, W. C. (1976) Nickeliferous Pyrrhotite Deposits, Knox County, Southeastern Maine in Lyons, P. C. and Brownlow, A. H. (editors) Studies in New England Geology, Memoir 146, Geological Society of America, p. 319-347.
Gibbsite
Formula: Al(OH)3
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v.1.
Glucine
Formula: CaBe4(PO4)2(OH)4 · 0.5H2O
Reference: King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates. Mineralogical Record 22:382
Goethite
Formula: α-Fe3+O(OH)
Localities: Reported from at least 62 localities in this region.
Gold
Formula: Au
Localities: Reported from at least 19 localities in this region.
Gorceixite
Formula: BaAl3(PO4)(PO3OH)(OH)6
Goyazite
Formula: SrAl3(PO4)(PO3OH)(OH)6
Localities: Reported from at least 11 localities in this region.
Graftonite
Formula: Fe2+Fe2+2(PO4)2
Reference: "Maine Mineral Localities, 3rd Ed." by Thompson, W.B., et.al., 1998
Graphite
Formula: C
Localities: Reported from at least 21 localities in this region.
Grayite
Formula: (Th,Pb,Ca)(PO4) · H2O
Description: Pale yellow crystals to 1 mm with xenotime-(Y) and thorgummite.
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine.
Greenockite
Formula: CdS
Greifensteinite
Formula: Ca2Fe2+5Be4(PO4)6(OH)4 · 6H2O
Localities: Reported from at least 7 localities in this region.
Grossular
Formula: Ca3Al2(SiO4)3
Localities: Reported from at least 34 localities in this region.
Grossular var: Hessonite
Formula: Ca3Al2(SiO4)3
Grunerite
Formula: ☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Reference: King & Foord, 1994. Mineralogy of Maine, Vol. 1., p.178.
'Gummite'
Localities: Reported from at least 8 localities in this region.
Gypsum
Formula: CaSO4 · 2H2O
Halite
Formula: NaCl
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v1.
'Halloysite'
Formula: Al2(Si2O5)(OH)4
Reference: USGS Bull 445
Halloysite-7Å
Formula: Al2(Si2O5)(OH)4
Description: XRD by George Robinson at Canadian Museums of Nature
Reference: King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
Hastingsite
Formula: {Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2
Hausmannite
Formula: Mn2+Mn3+2O4
Hawleyite ?
Formula: CdS
Reference: Scott Soucey and Tim Blake specimens
Hedenbergite
Formula: CaFe2+Si2O6
Hematite
Formula: Fe2O3
Localities: Reported from at least 40 localities in this region.
Hematite var: Specularite
Formula: Fe2O3
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Hercynite
Formula: Fe2+Al2O4
Hercynite var: Picotite
Formula: (Fe,Mg)(Al,Cr)2O4
Locality: Stoneham, Oxford Co., Maine, USA - erroneously reported
Description: Has a question mark in reference indicating that the species is misidentified.
Reference: Anderson, 1991. Maine Mineral Localities, 2nd ed.
Herderite
Formula: CaBePO4(F,OH)
Heterosite
Formula: (Fe3+,Mn3+)PO4
Localities: Reported from at least 27 localities in this region.
'Heterosite-Purpurite Series'
Reference: various added photos
'Heulandite subgroup'
Description: A bad guess of what the original material was in the quartz pseudomorphs known for this locality. No original material ever found and probably replacements of feldspar crystals.
Reference: Cameron, Eugene N.; and others (1954) Pegmatite investigations, 1942-45, in New England. USGS Professional Paper 255.
Hisingerite
Formula: Fe3+2(Si2O5)(OH)4 · 2H2O
Holmquistite
Formula: ☐{Li2}{Mg3Al2}(Si8O22)(OH)2
Reference: King & Foord, 1994. Mineralogy of Maine, V.1, p.187.
'Hornblende'
Localities: Reported from at least 22 localities in this region.
Hübnerite
Formula: MnWO4
Locality: Blue Hill, Hancock Co., Maine, USA - erroneously reported
Reference: King, V. and Foord, 1994, Mineralogy of Maine, volume 1.
Humite
Formula: (Mg,Fe2+)7(SiO4)3(F,OH)2
Description: brownish pink grains to several mm in calc-silicate rock.
Reference: King & Foord, 1994. Mineralogy of Maine, Vol. 1., p.188.
Hureaulite
Formula: (Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
Localities: Reported from at least 10 localities in this region.
Hurlbutite
Formula: CaBe2(PO4)2
Reference: "Maine Mineral Localities, 3rd Ed." by Thompson, W.B., et.al., 1998)
'Hydronephelite'
Description: Dennis Hill is the type locality for this mineral, but it has been shown to be a mixture of gibbsite, natrolite, and diaspore. Hydronephelite was once called "white sodalite" as it formed a rim on normal blue sodalite.
Reference: King, V. and Foord, E., 1994, Mineralogy of Maine, v.1.
Hydroxycalciomicrolite
Formula: Ca1.5Ta2O6(OH)
Reference: Palache, C. and Gonyer, F., (1940), Microlite and Stibiotantalite from Topsham, Maine, American Mineralogist, v. v. 25, p. 411-417. (complete chemical analysis) undefined
Hydroxylapatite
Formula: Ca5(PO4)3(OH)
Localities: Reported from at least 20 localities in this region.
Hydroxylapatite var: Carbonate-rich Hydroxylapatite
Formula: Ca5(PO4,CO3)3(OH,O)
Localities: Reported from at least 9 localities in this region.
Hydroxylherderite
Formula: CaBe(PO4)(OH,F)
Localities: Reported from at least 31 localities in this region.
Hydrozincite
Formula: Zn5(CO3)2(OH)6
'Hypersthene'
Formula: (Mg,Fe)SiO3
Ice
Formula: H2O
'Iddingsite'
Formula: MgO · Fe2O3 · 3SiO2·4H2O
Ilmenite
Formula: Fe2+TiO3
Localities: Reported from at least 19 localities in this region.
'Indicolite'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Localities: Reported from at least 14 localities in this region.
Ishikawaite
Formula: U4+Fe2+Nb2O8
Localities: Reported from at least 7 localities in this region.
Jahnsite-(CaMnFe)
Formula: {Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaMnMn)
Formula: {Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
'Jahnsite Group'
Formula: XM1M22M32(H2O)8(OH)2(PO4)4
Localities: Reported from at least 10 localities in this region.
Jahnsite-(MnMnMn)
Formula: {Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Reference: Thompson, W, Joyner, D., Woodman, R., and King, V., 1998. Maine Mineral Localities, 3rd ed.; King and Foord, 1994, Mineralogy of Maine
Jarosite ?
Formula: KFe3+ 3(SO4)2(OH)6
Reference: Tim Blake and Scott Soucey specimens
Kaersutite
Formula: {Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Kainosite-(Y)
Formula: Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
Reference: King, V. and Foord, E., 2000, Mineralogy of Maine, volume 2, Addenda.
Kamphaugite-(Y)
Formula: Ca(Y,REE)(CO3)2(OH) · H2O
Reference: King, V. and Foord, E., 2000, Mineralogy of Maine, volume 2, Addenda.
Kaolinite
Formula: Al2(Si2O5)(OH)4
Localities: Reported from at least 19 localities in this region.
Kasolite
Formula: Pb(UO2)[SiO4] · H2O
Reference: "Maine Mineral Localities, 3rd Ed." by Thompson, W.B., et.al., 1998
Kastningite
Formula: (Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O
'Kerolite'
Formula: (Mg,Ni)3Si4O10(OH)2 · nH2O (n ~ 1)
'K Feldspar'
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Kosnarite (TL)
Formula: KZr2(PO4)3
Habit: Rhombohedral pale blue crystals which may have a a tiny c pinacoid.
Colour: Pale blue
Reference: Brownfield, M. E., Foord, E. E., Sutley, S. J. and Botinelly, T. (1993): Kosnarite, KZr2(PO4)3, a new mineral from Mount Mica and Black Mountain, Oxford County, Maine. Am. Mineral. 78, 653-656.
Kyanite
Formula: Al2(SiO4)O
Localities: Reported from at least 6 localities in this region.
'Labradorite'
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Localities: Reported from at least 16 localities in this region.
Lacroixite
Formula: NaAl(PO4)F
Reference: Fransolet, André-Mathieu (1989) The Problem of Na-Li Substitution in Primary Li-Al Phosphates: New Data on Lacroixite, a Relatively Widespread Mineral. Canadian Mineralogist: 27: 211-217.; Handbook of Mineralogy (http://www.handbookofmineralogy.org/pdfs/lacroixite.pdf)
Landesite (TL)
Formula: Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O
Reference: King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
Laueite
Formula: Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Localities: Reported from at least 13 localities in this region.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Lazulite
Formula: MgAl2(PO4)2(OH)2
Reference: King & Foord, 1994. Mineralogy of Maine, V. 1., p.211
Lepidocrocite
Formula: γ-Fe3+O(OH)
'Lepidolite'
Localities: Reported from at least 36 localities in this region.
'Lepidomelane'
Reference: West, D. P., Bradley, D., & Coish, R. (2016). The Litchfield pluton in south-central Maine: Carboniferous alkalic magmatism in northern New England, USA. Atlantic Geology, 52, 169-187.
Leucite
Formula: K(AlSi2O6)
Locality: Litchfield, Kennebec Co., Maine, USA - erroneously reported
Reference: www.galleries.com/minerals/silicate/leucite/leucite.htm
Leucophosphite
Formula: KFe3+2(PO4)2(OH) · 2H2O
Reference: No reference listed
Leucoxene
'Limonite'
Formula: (Fe,O,OH,H2O)
Localities: Reported from at least 20 localities in this region.
Linarite
Formula: PbCu(SO4)(OH)2
Linnaeite
Formula: Co2+Co3+2S4
'Lithian Muscovite'
Formula: KAl2(AlSi3O10)(OH)2
Reference: Rocks & Min., November 2000
Lithiophilite
Formula: LiMn2+PO4
Localities: Reported from at least 16 localities in this region.
Lizardite
Formula: Mg3(Si2O5)(OH)4
Löllingite
Formula: FeAs2
Localities: Reported from at least 14 localities in this region.
Ludlamite
Formula: Fe2+3(PO4)2 · 4H2O
Localities: Reported from at least 7 localities in this region.
Mackinawite
Formula: (Fe,Ni)9S8
Magnesiochromite
Formula: MgCr2O4
Locality: Stoneham, Oxford Co., Maine, USA - erroneously reported
Description: Has a question mark in the reference indicating the species is misidentified.
Reference: Anderson, 1991. Maine Mineral Localities, 2nd ed.
Magnesio-hornblende
Formula: ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Magnesite
Formula: MgCO3
Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 72 localities in this region.
Malachite
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 15 localities in this region.
'Manganese Oxides'
Localities: Reported from at least 16 localities in this region.
'Manganese Oxides var: Manganese Dendrites'
Localities: Reported from at least 9 localities in this region.
Mangangordonite (TL)
Formula: Mn2+Al2(PO4)2(OH)2 · 8H2O
Type Locality:
Reference: King & Foord, 1994. Mineralogy of Maine, V.1., p.225.
Manganite
Formula: Mn3+O(OH)
Marcasite
Formula: FeS2
Localities: Reported from at least 9 localities in this region.
Margarite
Formula: CaAl2(Al2Si2O10)(OH)2
Marialite
Formula: Na4Al3Si9O24Cl
Mccrillisite (TL)
Formula: NaCs(Be,Li)Zr2(PO4)4 · 1-2H2O
Type Locality:
Habit: Simple steeply pyramidal crystals.
Colour: White
Reference: Canadian Mineralogist(1994) 32, 839-842 King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
Meionite
Formula: Ca4Al6Si6O24CO3
Localities: Reported from at least 15 localities in this region.
Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
Messelite
Formula: Ca2Fe2+(PO4)2 · 2H2O
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Localities: Reported from at least 47 localities in this region.
Metaschoepite
Formula: (UO2)8O2(OH)12 · 10H2O
Reference: King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
Metastibnite
Formula: Sb2S3
Reference: Anderson, 1991. Maine Mineral Localities, 2nd ed.
Metaswitzerite
Formula: Mn2+3(PO4)2 · 4H2O
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Localities: Reported from at least 18 localities in this region.
Metauranospinite
Formula: Ca(UO2)2(AsO4)2 · 8H2O
Description: Yellow platy masses on loellingite. Formerly call Unknown #9
Reference: King and Foord, 2000, Mineralogy of Maine, Addenda to Volume 1.
Metavanmeersscheite
Formula: U6+(UO2)3(PO4)2(OH)6 · 2H2O
Reference: Gene Foord, personal communication, 1993 and King and Foord, 1994, Mineralogy of Maine listing both ends of the hydration series "vanmeersscheite/metavanmeersscheite"
'Mica Group'
Localities: Reported from at least 10 localities in this region.
Microcline
Formula: K(AlSi3O8)
Localities: Reported from at least 428 localities in this region.
Microcline var: Amazonite
Formula: K(AlSi3O8)
'Microlite Group'
Formula: A2-mTa2X6-wZ-n
Localities: Reported from at least 16 localities in this region.
Milarite
Formula: K2Ca4Al2Be4Si24O60 · H2O
Reference: http://www.mainemineralgemmuseum.org/news-january-2016/#science
Mimetite ?
Formula: Pb5(AsO4)3Cl
Description: No reference.
Mitridatite
Formula: Ca2Fe3+3(PO4)3O2 · 3H2O
Localities: Reported from at least 14 localities in this region.
Molybdenite
Formula: MoS2
Localities: Reported from at least 29 localities in this region.
Molybdite
Formula: MoO3
Reference: Gems and Minerals of America - Jay Ellis Ransom -1974
Monazite-(Ce)
Formula: Ce(PO4)
Localities: Reported from at least 11 localities in this region.
Montebrasite
Formula: LiAl(PO4)(OH)
Localities: Reported from at least 38 localities in this region.
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Localities: Reported from at least 26 localities in this region.
Moraesite
Formula: Be2(PO4)(OH) · 4H2O
Localities: Reported from at least 6 localities in this region.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 471 localities in this region.
Muscovite var: Damourite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 10 localities in this region.
Muscovite var: Fuchsite
Formula: K(Al,Cr)3Si3O10(OH)2
Muscovite var: Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Reference: King & Foord, 1994. Mineralogy of Maine, V.1.
Muscovite var: Schernikite
Formula: KAl2(AlSi3O10)(OH)2
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 14 localities in this region.
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
'Natromontebrasite'
Description: Misidentified by a mineral dealer so the fake name could be sold. The mineral is ordinary montebrasite. A "natromontebrasite" from one of the distributors, but from the "original lot of specimens" was chemically analyzed and proved to be typical montebrasite with very little Na.
Reference: King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
Neotocite
Formula: (Mn,Fe,Mg)SiO3 · H2O
Nepheline
Formula: Na3K(Al4Si4O16)
Localities: Reported from at least 6 localities in this region.
Nepheline var: Eleolite
Formula: (Na,K)AlSiO4
Nickeline
Formula: NiAs
'Nickel-iron'
Reference: www.maine.gov/doc/nrimc/mgs/explore/minerals/sites/mar99.htm
Niggliite
Formula: PtSn
Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Localities: Reported from at least 10 localities in this region.
Nsutite
Formula: (Mn4+,Mn2+)(O,OH)2