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Watertown, Litchfield Co., Connecticut, USAi
Regional Level Types
WatertownTownship
Litchfield Co.County
ConnecticutState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 36' 9'' North , 73° 6' 59'' West
Latitude & Longitude (decimal):
Locality type:


A town incorporated in 1780, underlain by mostly metamorphic bedrock.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

24 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Anatase
Formula: TiO2
Habit: bipyramidal
Colour: metallic blue to yellow and green
Description: "brilliant, metallic bluish, bipyramidal crystals and as bi-colored, glassy crystals exhibiting the same morphology (these crystals are blue to yellow, at times greenish in color), both deeply striated and occurring in alpine type seams"
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Description: Included in a list of minerals with no details, but common in the area.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
Brookite
Formula: TiO2
Habit: tabular
Description: The Webers found several crystals in a vuggy feldspar on Route 8 in Watertown that are believed to be brookite. The crystals are exceedingly thin, brilliant, tabular, have zonal coloration, and striations on b. The largest was less than 1 mm long and no more than 1/2mm wide; unfortunately this crystal was lost while measurements were being made. Associated with anatase and rutile.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Calcite
Formula: CaCO3
Description: Associated with zeolites in fractured schist.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Chabazite-Ca
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Habit: pseudo-cubic
Colour: tan to orange
Description: Pseudo-cubic crystals to 5mm, in fractures in granofels with calcite and stilbite-Ca. A crystal from this specimen www.mindat.org/photo-907897.html was analyzed by SEM-EDS showing it to be chabazite-Ca.
Reference: Harold Moritz collection
'Chlorite Group'
Habit: micaceous
Colour: dark green
Description: In Alpine-type clefts with anatase, brookite.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Epistilbite ?
Formula: CaAl2Si6O16 · 5H2O
Description: According to Januzzi (1976) "Epistilbite has been collected and confirmed from the Route 8 locality in Watertown." However, there is no mention of it in Tschernich (1992), which does mention other Connecticut localities for this mineral.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston
'Gummite'
Reference: Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
'Heulandite subgroup'
Description: With other zeolites and calcite in fractured schist.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.; Tschernich, Rudy W. (1992), Zeolites of the World. Geoscience Press, Phoenix: 114.
'Hornblende'
Reference: Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston
Kyanite
Formula: Al2(SiO4)O
Reference: Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Description: With other zeolites and calcite in fractured schist.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.; Tschernich, Rudy W. (1992), Zeolites of the World. Geoscience Press, Phoenix: 114.
'Microlite Group'
Formula: A2-mTa2X6-wZ-n
Reference: Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
'Microlite Group var: Uranmicrolite (of Hogarth 1977)'
Reference: Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
Monazite-(Ce)
Formula: Ce(PO4)
Reference: Nitze, Henry B. C., 1895, Monazite, and Monazite Deposits in North Carolina, Bulletin 9, North Carolina Geological Survey, pp. 47.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Pickeringite
Formula: MgAl2(SO4)4 · 22H2O
Description: Alteration of pyrite.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Pyrite
Formula: FeS2
Description: in many shapes and forms
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Quartz
Formula: SiO2
Quartz var: Agate
Reference: Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston
Quartz var: Chalcedony
Formula: SiO2
Reference: Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston
Rutile
Formula: TiO2
Reference: Rocks and Minerals (1995) 70:420-425; Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Nitze, Henry B. C., 1895, Monazite, and Monazite Deposits in North Carolina, Bulletin 9, North Carolina Geological Survey, pp. 47.
Sillimanite
Formula: Al2(SiO4)O
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Sphalerite
Formula: ZnS
Description: No details in the reference, but common in the area as polysynthetically twinned crystals often misidentified as wurtzite.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Stellerite ?
Formula: Ca4(Si28Al8)O72 · 28H2O
Habit: bowties and sheaf aggregates
Colour: orange
Description: This specimen https://www.mindat.org/photo-618484.html was analyzed by SEM-EDS and showed no more than a trace of Na or K, making it a good candidate for stellerite, although this method alone is not definitive. Stellerite cannot be visually distinguished from stilbite-Ca.
Reference: Harold Moritz collection
Stilbite-Ca
Formula: NaCa4[Al9Si27O72] · nH2O
Habit: rectangular crystals or radial aggregates
Colour: colorless to pale tan
Description: Radial aggregates to 2 cm, in fractures in granofels with calcite and chabazite-Ca. Two specimens, one a radiating aggregate www.mindat.org/photo-946965.html the other an isolated crystal www.mindat.org/photo-946968.html were analyzed by SEM-EDS and have a calculated apfu of Na above 0.4, and so can be safely identified as stilbite-Ca rather than stellerite, which cannot be visually distinguished.
Reference: Harold Moritz collection
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Samuel Robinson (1825) A Catalogue of American Minerals, with their localities. Boston
Uraninite
Formula: UO2
Reference: Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Brookite4.DD.10TiO2
'Microlite Group'4.00.A2-mTa2X6-wZ-n
'var: Uranmicrolite (of Hogarth 1977)'4.00.A2-mTa2X6-wZ-n
Quartz4.DA.05SiO2
var: Agate4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Rutile4.DB.05TiO2
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Pickeringite7.CB.85MgAl2(SO4)4 · 22H2O
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Monazite-(Ce)8.AD.50Ce(PO4)
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Chabazite-Ca9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Epistilbite ?9.GD.45CaAl2Si6O16 · 5H2O
Kyanite9.AF.15Al2(SiO4)O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Sillimanite9.AF.05Al2(SiO4)O
Stellerite ?9.GE.15Ca4(Si28Al8)O72 · 28H2O
Stilbite-Ca9.GE.10NaCa4[Al9Si27O72] · nH2O
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Gummite'-
'Heulandite subgroup'-
'Hornblende'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Anatase4.4.4.1TiO2
Brookite4.4.5.1TiO2
Rutile4.4.1.1TiO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
'Microlite Group'8.2.2.1A2-mTa2X6-wZ-n
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AB2(XO4)4·H2O
Pickeringite29.7.3.1MgAl2(SO4)4 · 22H2O
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(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
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
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
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(SiO3OH)2 · 5H2O
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
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
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Chabazite-Ca77.1.2.1(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Epistilbite ?77.1.6.2CaAl2Si6O16 · 5H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Stellerite ?77.1.4.4Ca4(Si28Al8)O72 · 28H2O
Stilbite-Ca77.1.4.3NaCa4[Al9Si27O72] · nH2O
Unclassified Minerals, Mixtures, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Gummite'-
'Heulandite subgroup'-
'Hornblende'-
'Microlite Group
var: Uranmicrolite (of Hogarth 1977)'
-A2-mTa2X6-wZ-n
Quartz
var: Agate
-SiO2
var: Chalcedony-SiO2

List of minerals for each chemical element

HHydrogen
H Stilbite-CaNaCa4[Al9Si27O72] · nH2O
H Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
H ApatiteCa5(PO4)3(Cl/F/OH)
H PickeringiteMgAl2(SO4)4 · 22H2O
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H StelleriteCa4(Si28Al8)O72 · 28H2O
H EpistilbiteCaAl2Si6O16 · 5H2O
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C CalciteCaCO3
OOxygen
O AnataseTiO2
O Stilbite-CaNaCa4[Al9Si27O72] · nH2O
O Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
O RutileTiO2
O ApatiteCa5(PO4)3(Cl/F/OH)
O CalciteCaCO3
O PickeringiteMgAl2(SO4)4 · 22H2O
O QuartzSiO2
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O AlbiteNa(AlSi3O8)
O UraniniteUO2
O ZirconZr(SiO4)
O LaumontiteCaAl2Si4O12 · 4H2O
O KyaniteAl2(SiO4)O
O Garnet GroupX3Z2(SiO4)3
O Quartz (var: Chalcedony)SiO2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O Monazite-(Ce)Ce(PO4)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O BrookiteTiO2
O SillimaniteAl2(SiO4)O
O MuscoviteKAl2(AlSi3O10)(OH)2
O StelleriteCa4(Si28Al8)O72 · 28H2O
O EpistilbiteCaAl2Si6O16 · 5H2O
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Na Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Na AlbiteNa(AlSi3O8)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg PickeringiteMgAl2(SO4)4 · 22H2O
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Al Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Al PickeringiteMgAl2(SO4)4 · 22H2O
Al AlbiteNa(AlSi3O8)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al KyaniteAl2(SiO4)O
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al SillimaniteAl2(SiO4)O
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al StelleriteCa4(Si28Al8)O72 · 28H2O
Al EpistilbiteCaAl2Si6O16 · 5H2O
SiSilicon
Si Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Si Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Si QuartzSiO2
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si AlbiteNa(AlSi3O8)
Si ZirconZr(SiO4)
Si LaumontiteCaAl2Si4O12 · 4H2O
Si KyaniteAl2(SiO4)O
Si Garnet GroupX3Z2(SiO4)3
Si Quartz (var: Chalcedony)SiO2
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si SillimaniteAl2(SiO4)O
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si StelleriteCa4(Si28Al8)O72 · 28H2O
Si EpistilbiteCaAl2Si6O16 · 5H2O
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P Monazite-(Ce)Ce(PO4)
SSulfur
S PyriteFeS2
S PickeringiteMgAl2(SO4)4 · 22H2O
S SphaleriteZnS
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Ca Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca CalciteCaCO3
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca StelleriteCa4(Si28Al8)O72 · 28H2O
Ca EpistilbiteCaAl2Si6O16 · 5H2O
TiTitanium
Ti AnataseTiO2
Ti RutileTiO2
Ti BrookiteTiO2
FeIron
Fe PyriteFeS2
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
ZnZinc
Zn SphaleriteZnS
ZrZirconium
Zr ZirconZr(SiO4)
CeCerium
Ce Monazite-(Ce)Ce(PO4)
TaTantalum
Ta Microlite GroupA2-mTa2X6-wZ-n
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
U UraniniteUO2

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