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Pelton's Quarry, Portland, Middlesex County, Connecticut, USAi
Regional Level Types
Pelton's QuarryQuarry
Portland- not defined -
Middlesex CountyCounty
ConnecticutState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
41° 36' 3'' North , 72° 34' 36'' West
Latitude & Longitude (decimal):
41.60111,-72.57667
GeoHash:
G#: drkksmr21
GRN:
N28W40
Type:
Quarry
Köppen climate type:
Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Lake Pocotopaug3,436 (2017)5.5km
Cromwell13,750 (2017)5.7km
Portland5,862 (2017)6.2km
East Hampton2,691 (2017)6.8km
Middletown46,756 (2017)7.5km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut20km
Bristol Gem & Mineral ClubBristol, Connecticut32km
New Haven Mineral ClubNew Haven, Connecticut44km
Mindat Locality ID:
18296
Long-form identifier:
mindat:1:2:18296:3
GUID (UUID V4):
2dae9fde-5f2f-40a2-833a-0ec98d98e41f


Some references such as Otfinoski (1988) state that pegmatite quarrying probably began in the Middletown district in 1782 [sic] when Portland resident Ralph Pelton, Deacon of the Central Church, began working this quarry near his home just east of Collins Hill. However, Beers' (1884) The History of Middlesex County 1635-1885 states:

The fine feldspar mine, near Deacon Ralph PELTON's, has been worked by him since 1872. Several thousand tons of the stone have been taken out. A sample of the feldspar taken to the Centennial was pronounced the finest there. Fine beryls, garnets, etc., have been found here.

THE FELDSPAR MILL, near Deacon Ralph PELTON's, was built by him in 1877. The grinding is done by two stone chasers about five feet in diameter, moving around upon a bedstone of the same material. The crushed feldspar then passes to a revolving sieve, and thence to a cylinder, containing 3,300 pounds of Norway pebbles, of 18 revolutions per minute, where it is finely pulverized.


Somehow, 1872 was transposed to 1782 and the error was perpetuated. This is supported by Shepard (1837), who surveyed quarrying throughout the state in the 1830s and does not mention the Pelton Quarry, but discusses the Tollgate "China Stone" Quarry in Middletown numerous times. Nor does Robinson (1825).

The presence of Pelton's Quarry near Collins Hill has lead some to conclude that he started the quarrying at the hill's summit that later became the famous Strickland Quarry. But the presence of the old quarry at his property just to the east dispels that notion.

Little has been written about the mineralogy. Jarnot (1995), who gives the town incorrectly as Haddam, mentions "well-formed aquamarine crystals of a characteristic deep blue color, sometimes grading almost to black." Foye (1922) mentions that it "has long been inactive. It probably produced a number of rare minerals in its day, but it is now known as the source of two minerals, unique for the region, bismutite and samarskite [since found elsewhere]. Beryl and crystals of muscovite from the locality may be found in the Wesleyan museum." [see photos.] Wells (1887) analyzed a bismutite mass from here that was in the George Brush collection.

Coordinates are approximate. Private property.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


22 valid minerals. 2 erroneous literature entries.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Almandine
Formula: Fe2+3Al2(SiO4)3
ⓘ Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Description: fka biotite
ⓘ Autunite
Formula: Ca(UO2)2(PO4)2 · 10-12H2O
ⓘ Bertrandite
Formula: Be4(Si2O7)(OH)2
✪ Beryl
Formula: Be3Al2(Si6O18)
Habit: elongated hexagonal prisms with pinacoidal terminations
Colour: blue-green, deep aqua to almost black
Description: Very well-formed and gemmy crystals, typically doubly-terminated.
References:
Jarnot (1995)
✪ Beryl var. Aquamarine
Formula: Be3Al2Si6O18
Habit: elongated hexagonal prisms, typically terminated by pinacoids
Colour: blue-green, deep aqua to almost black
Description: well formed crystals with characteristic deep blue color sometimes grading to almost black
ⓘ Bismuthinite
Formula: Bi2S3
ⓘ Bismutite
Formula: (BiO)2CO3
Habit: massive replacement of bismuthinite
Colour: yellow-green to gray
Description: A mass in the George Brush collection was analyzed (Wells, 1887).
ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'
Habit: tabular
Colour: black with colorful iridescence
ⓘ Fluorapatite
Formula: Ca5(PO4)3F
ⓘ Gahnite
Formula: ZnAl2O4
Habit: octahedral
Colour: dark green
Description: translucent, micro crystals and anhedral aggregates with beryl in smoky quartz
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ 'Limonite'
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ 'Monazite'
Formula: REE(PO4)
References:
Dana 6: 1061.
✪ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: pseudohexagonal tabular to elongated crystals
Colour: dark silver to bronze
Description: Sharp, dark, well-formed crystals.
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Opal var. Opal-AN
Formula: SiO2 · nH2O
ⓘ Quartz
Formula: SiO2
ⓘ Samarskite-(Y)
Formula: YFe3+Nb2O8
Description: Reported in the old literature, but probably not analyzed, may be ishikawaite because ishikawaite was confirmed by analysis at the nearby Penfield Quarry.
References:
Dana 7:I:799.
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
Description: speculative
ⓘ 'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
Description: Mistake for columbite-tantalite
ⓘ Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
ⓘ Uraninite
Formula: UO2
ⓘ Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘ Xenotime-(Y) ?
Formula: Y(PO4)
Description: In a list of minerals without supporting information.
ⓘ Zircon
Formula: Zr(SiO4)
ⓘ Zircon var. Cyrtolite
Formula: Zr[(SiO4),(OH)4]

Gallery:

Be3Al2(Si6O18)ⓘ Beryl
Be3Al2Si6O18ⓘ Beryl var. Aquamarine
KAl2(AlSi3O10)(OH)2ⓘ Muscovite

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘBismuthinite2.DB.05Bi2S3
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘGahnite4.BB.05ZnAl2O4
ⓘQuartz4.DA.05SiO2
ⓘOpal4.DA.10SiO2 · nH2O
ⓘvar. Opal-AN4.DA.10SiO2 · nH2O
ⓘSamarskite-(Y)4.DB.25YFe3+Nb2O8
ⓘUraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
ⓘBismutite5.BE.25(BiO)2CO3
Group 8 - Phosphates, Arsenates and Vanadates
ⓘXenotime-(Y) ?8.AD.35Y(PO4)
ⓘFluorapatite8.BN.05Ca5(PO4)3F
ⓘAutunite8.EB.05Ca(UO2)2(PO4)2 · 10-12H2O
ⓘTorbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
ⓘSpessartine ?9.AD.25Mn2+3Al2(SiO4)3
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘZircon9.AD.30Zr(SiO4)
ⓘvar. Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
ⓘUranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘBertrandite9.BD.05Be4(Si2O7)(OH)2
ⓘBeryl9.CJ.05Be3Al2(Si6O18)
ⓘvar. Aquamarine9.CJ.05Be3Al2Si6O18
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘAnnite9.EC.20KFe2+3(AlSi3O10)(OH)2
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Columbite-(Fe)-Columbite-(Mn) Series'-
ⓘ'Monazite'-REE(PO4)
ⓘ'Tantalite' ?-(Mn,Fe)(Ta,Nb)2O6
ⓘ'Limonite'-
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2

List of minerals for each chemical element

HHydrogen
Hⓘ AnniteKFe32+(AlSi3O10)(OH)2
Hⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Hⓘ BertranditeBe4(Si2O7)(OH)2
Hⓘ Opal var. Opal-ANSiO2 · nH2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ OpalSiO2 · nH2O
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Hⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Hⓘ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
BeBeryllium
Beⓘ Beryl var. AquamarineBe3Al2Si6O18
Beⓘ BertranditeBe4(Si2O7)(OH)2
Beⓘ BerylBe3Al2(Si6O18)
BBoron
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
Cⓘ Bismutite(BiO)2CO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AnniteKFe32+(AlSi3O10)(OH)2
Oⓘ Beryl var. AquamarineBe3Al2Si6O18
Oⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Oⓘ AlmandineFe32+Al2(SiO4)3
Oⓘ BertranditeBe4(Si2O7)(OH)2
Oⓘ Bismutite(BiO)2CO3
Oⓘ BerylBe3Al2(Si6O18)
Oⓘ FluorapatiteCa5(PO4)3F
Oⓘ GahniteZnAl2O4
Oⓘ Opal var. Opal-ANSiO2 · nH2O
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MicroclineK(AlSi3O8)
Oⓘ MonaziteREE(PO4)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ OpalSiO2 · nH2O
Oⓘ QuartzSiO2
Oⓘ Samarskite-(Y)YFe3+Nb2O8
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
Oⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Oⓘ UraniniteUO2
Oⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Oⓘ Xenotime-(Y)Y(PO4)
Oⓘ ZirconZr(SiO4)
Oⓘ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FFluorine
Fⓘ FluorapatiteCa5(PO4)3F
Fⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ AnniteKFe32+(AlSi3O10)(OH)2
Alⓘ Beryl var. AquamarineBe3Al2Si6O18
Alⓘ AlmandineFe32+Al2(SiO4)3
Alⓘ BerylBe3Al2(Si6O18)
Alⓘ GahniteZnAl2O4
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ AnniteKFe32+(AlSi3O10)(OH)2
Siⓘ Beryl var. AquamarineBe3Al2Si6O18
Siⓘ AlmandineFe32+Al2(SiO4)3
Siⓘ BertranditeBe4(Si2O7)(OH)2
Siⓘ BerylBe3Al2(Si6O18)
Siⓘ Opal var. Opal-ANSiO2 · nH2O
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ OpalSiO2 · nH2O
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Siⓘ ZirconZr(SiO4)
Siⓘ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
PPhosphorus
Pⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Pⓘ FluorapatiteCa5(PO4)3F
Pⓘ MonaziteREE(PO4)
Pⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Pⓘ Xenotime-(Y)Y(PO4)
SSulfur
Sⓘ BismuthiniteBi2S3
ClChlorine
Clⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
KPotassium
Kⓘ AnniteKFe32+(AlSi3O10)(OH)2
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Caⓘ FluorapatiteCa5(PO4)3F
Caⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
MnManganese
Mnⓘ SpessartineMn32+Al2(SiO4)3
Mnⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
FeIron
Feⓘ AnniteKFe32+(AlSi3O10)(OH)2
Feⓘ AlmandineFe32+Al2(SiO4)3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Samarskite-(Y)YFe3+Nb2O8
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Feⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
CuCopper
Cuⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
ZnZinc
Znⓘ GahniteZnAl2O4
YYttrium
Yⓘ Samarskite-(Y)YFe3+Nb2O8
Yⓘ Xenotime-(Y)Y(PO4)
ZrZirconium
Zrⓘ ZirconZr(SiO4)
Zrⓘ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
NbNiobium
Nbⓘ Samarskite-(Y)YFe3+Nb2O8
Nbⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
TaTantalum
Taⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
BiBismuth
Biⓘ BismuthiniteBi2S3
Biⓘ Bismutite(BiO)2CO3
UUranium
Uⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Uⓘ TorberniteCu(UO2)2(PO4)2 · 12H2O
Uⓘ UraniniteUO2
Uⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

Other Regions, Features and Areas containing this locality

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This page 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. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Dana 6:1061
Dana 7:I:799
Robinson, Samuel. (1825): A Catalogue of American Minerals, With Their Localities; Including All Which Are Known to Exist in the United States and British Provinces, And Having the Towns, Counties, and Districts in Each State and Province Arranged Alphabetically. With an Appendix, Containing Additional Localities and a Tabular View. Cummings, Hilliard, & Co., Boston.
Shepard, Charles U. (1837): REPORT ON THE GEOLOGICAL SURVEY OF CONNECTICUT.
J. H. Beers & Co. (1884): The History of Middlesex County 1635-1885.
Wells, H. L. (1887), Bismutosphaerite from Willimantic and Portland. American Journal of Science: s. 3, 34: 271-4.
Foye, Wilbur G. (1922) Mineral localities in the vicinity of Middletown, Connecticut. American Mineralogist, 7 (1) 4-12
Schairer, J. F. (1931): The Minerals of Connecticut. State Geological and Natural History Survey Bulletin 51.
Zodac, Peter (1941): The Andrews Quarry Near Portland, Conn. Rocks and Minerals: 16(5): 164-167.
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.
Jones, Robert W. (1960): Luminescent Minerals of Connecticut, A Guide to Their Properties and Locations.
Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Henderson, William A. Jr. (1975) The Bertrandites of Connecticut, in May - June 1975. The Mineralogical Record, 6 (3) Tucson. 114-123
Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA.
Otfinoski, Carla (1988): Pegmatite Quarrying In the Middletown District. Unpublished masters thesis. Wesleyan University, Middletown, Connecticut.
Jarnot, Bruce (1995) Connecticut Gems & Gem Minerals. Rocks & Minerals, 70 (6) 378-382 doi:10.1080/00357529.1995.11761564
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
dunhamwilcox.net (n.d.) http://dunhamwilcox.net/town_hist/portland_history.htm
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