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East Hampton, Middlesex Co., Connecticut, USA


List of minerals arranged by Dana 8th Edition classification
Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Breithauptite ?2.8.11.2NiSb
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Nickeline ?2.8.11.1NiAs
Pyrrhotite2.8.10.1Fe1-xS (x = 0 to 0.17)
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Bismuthinite ?2.11.2.3Bi2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Cobaltite ?2.12.3.1CoAsS
Gersdorffite2.12.3.2NiAsS
Löllingite2.12.2.9FeAs2
Marcasite2.12.2.1FeS2
Molybdenite ?2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Rammelsbergite ?2.12.2.12NiAs2
Safflorite ?2.12.2.11CoAs2
Group 4 - SIMPLE OXIDES
A2X3
Arsenolite ?4.3.9.1As2O3
AX2
Cassiterite4.4.1.5SnO2
Rutile
var: Strüverite		4.4.1.3(Ti,Ta,Fe)O2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Gahnite7.2.1.4ZnAl2O4
Magnetite ?7.2.2.3Fe2+Fe3+2O4
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Ixiolite8.1.10.1(Ta,Nb,Sn,Fe,Mn)4O8
Samarskite-(Y) ?8.1.11.1(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Yttrocolumbite-(Y) ?8.1.3.2Y(U4+,Fe2+)Nb2O8
A2B2O6(O,OH,F)
Microlite Group8.2.2.1
Pyrochlore Group ?8.2.1.1A2Nb2(O,OH)6Z
AB2O6
Columbite-(Fe)8.3.2.2FeNb2O6
Tantalite-(Mn)8.3.2.3MnTa2O6
Tanteuxenite-(Y)8.3.8.3(Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Bastnäsite-(Ce)16a.1.1.1(Ce,La)(CO3)F
Beyerite ?16a.2.3.1Ca(BiO)2(CO3)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Melanterite29.6.10.1FeSO4 · 7H2O
AB2(XO4)4·H2O
Pickeringite29.7.3.1MgAl2(SO4)4 · 22H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Jarosite ?30.2.5.1KFe3+ 3(SO4)2(OH)6
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
ABXO4
Ferrisicklerite38.1.4.1Li1-x(Fe3+xFe2+1-x)PO4
Triphylite38.1.1.1LiFe2+PO4
AXO4
Heterosite38.4.1.1(Fe3+,Mn3+)PO4
Monazite-(Ce)38.4.3.1(Ce,La,Nd,Th)(PO4)
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Messelite40.2.2.2Ca2(Fe2+,Mn2+)(PO4)2 · 2H2O
Meta-autunite40.2a.1.2Ca(UO2)2(PO4)2 · 6-8H2O
Metatorbernite40.2a.13.2Cu(UO2)2(PO4)2 · 8H2O
Phosphophyllite40.2.7.1Zn2Fe(PO4)2 · 4H2O
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
A3(XO4)2·xH2O
Annabergite40.3.6.4Ni3(AsO4)2 · 8H2O
Erythrite40.3.6.3Co3(AsO4)2 · 8H2O
Ludlamite40.3.5.1(Fe,Mn,Mg)3(PO4)2 · 4H2O
Vivianite40.3.6.1Fe2+3(PO4)2 · 8H2O
(AB)5(XO4)2·xH2O
Grayite40.4.7.4(Th,Pb,Ca)(PO4) · H2O
Scorodite40.4.1.3FeAsO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Hydroxylherderite41.5.4.2CaBe(PO4)(OH,F)
A2(XO4)Zq
Triplite41.6.1.2(Mn2+,Fe2+)2(PO4)(F,OH)
(AB)7(XO4)4Zq
Arrojadite-(KFe) ?41.7.2.1{KNa}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(OH)2
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Hydroxylapatite41.8.1.3Ca5(PO4)3(OH)
(AB)5(XO4)3Zq
Rockbridgeite ?41.9.2.1Fe2+Fe3+4(PO4)3(OH)5
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A2(XO4)Zq·xH2O
Moraesite ?42.6.1.1Be2(PO4)(OH) · 4H2O
(AB)2(XO4)Zq·xH2O
Roscherite ?42.7.7.1Ca2Mn2+5Be4(PO4)6(OH)4 · 6H2O
(AB)5(XO4)3Zq·xH2O
Mitridatite42.8.4.1Ca2Fe3+3(PO4)3O2 · 3H2O
(AB)3(XO4)2Zq·xH2O
Beraunite42.11.16.1Fe2+Fe3+5(PO4)4(OH)5 · 4H2O
Laueite42.11.10.1Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Strunzite42.11.9.1Mn2+Fe3+2(PO4)2(OH)2 · 6H2O
Whitmoreite42.11.20.1Fe2+Fe3+2(PO4)2(OH)2 · 4H2O
Xanthoxenite ?42.11.15.1Ca4Fe3+2(PO4)4(OH)2 · 3H2O
Group 43 - COMPOUND PHOSPHATES, ETC.
Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
Diadochite43.5.2.1Fe3+2(PO4)(SO4)(OH) · 5H2O
'Pitticite' ?43.5.3.1(Fe, SO4, AsO4, H2O) ?
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Powellite ?48.1.2.2Ca(MoO4)
Scheelite48.1.2.1Ca(WO4)
Wulfenite ?48.1.3.1Pb(MoO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Grossular51.4.3b.2Ca3Al2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1ZrSiO4
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Kyanite52.2.2c.1Al2(SiO4)O
Sillimanite52.2.2a.1Al2(SiO4)O
Staurolite52.2.3.1(Fe2+,Mg,Zn)1.5-2Al9(SiO4)4O6(OH,O)2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Cerite-(Ce) ?52.4.6.1(Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3
Titanite52.4.3.1CaTi(SiO4)O
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Uranophane53.3.1.2Ca(UO2)2[HSiO4]2 · 5H2O
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Allanite-(Ce)58.2.1a.1{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with Al substituted rings
Cordierite ?61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Six-Membered Rings with borate groups
Dravite61.3.1.9Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Elbaite61.3.1.8Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Foitite ?61.3.1.1(□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OH
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
'Uvite' ?61.3.1.3Ca(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Diopside ?65.1.3a.1CaMgSi2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Cummingtonite66.1.1.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Tremolite ?66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 70 - INOSILICATES Column or Tube Structures
Column or Tube Structures with chains linked by Be
Bavenite70.5.3.1Ca4Be2Al2Si9O26(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Annite71.2.2b.3KFe2+3(AlSi3O10)(OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1NaAlSi3O8
Microcline76.1.1.5KAlSi3O8
Unclassified Minerals
Actinolite-☐{Ca2}{(Mg,Fe2+)5}(Si8O22)(OH)2
Albite
var: Cleavelandite		-NaAlSi3O8
var: Oligoclase-(Na,Ca)[Al(Si,Al)Si2O8]
'Albite-Anorthite Series'-
Anorthite
var: Labradorite		-(Ca,Na)[Al(Al,Si)Si2O8]
Arsenopyrite
var: Danaite		-(Fe0.90Co0.10)AsS - (Fe0.65Co0.35)AsS
Beryl
var: Aquamarine		-Be3Al2Si6O18
var: Heliodor-Be3Al2(Si6O18)
var: Morganite-Be3Al2(Si6O18)
'Biotite'-
'Chlorite Group'-
'Columbite'-(Fe,Mn)(Nb,Ta)2O6
'Copiapite Group'-
Fluorapatite
var: Mn-bearing Fluorapatite		-(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn3+]O4)3(F,Cl,OH)
Fluorite
var: Chlorophane		-CaF2
'Garnet'-X3Z2(SiO4)3
'Hornblende'-
Hydrokenoelsmoreite ?-◻2W2O6(H2O)
var: Ferritungstite ?-◻2W2O6(H2O)
'K Feldspar
var: Adularia'		-KAlSi3O8
Kaolinite-Al2(Si2O5)(OH)4
'Lanthanite' ?-
Lepidolite-
'Limonite'-FeO(OH) · nH2O
Microlite Group
var: Uranmicrolite (of Hogarth 1977)		-
'Monazite'-
Muscovite
var: Sericite		-KAl2(AlSi3O10)(OH)2
'Olivine' ?-(Mg,Fe2+)2SiO4
Opal
var: Opal-AN		-SiO2 · nH2O
'Perthite'-
Quartz
var: Ferruginous Quartz		-SiO2
var: Rose Quartz-SiO2
var: Smoky Quartz-SiO2
'Scapolite'-
'Tantalite' ?-(Fe,Mn)(Ta,Nb)2O6
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
'Voltzite' ?-
'Xenotime' ?-
Zircon
var: Cyrtolite		-Zr[(SiO4),(OH)4]


147 entries listed. 127 valid minerals.

References

Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954): Pegmatite Investigations 1942-45 New England; USGS Professional Paper 255.

Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.

Stugard, Frederick, Jr. (1958): Pegmatites of the Middletown Area, Connecticut. USGS Bulletin 1042-Q.

Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.

Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 403.

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