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Hale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USAi
Regional Level Types
Hale-Walker prospectsGroup of Prospects (Abandoned)
Collins HillHill
Portland- not defined -
Middlesex CountyCounty
ConnecticutState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
41° 35' 7'' North , 72° 35' 17'' West
Latitude & Longitude (decimal):
41.58528,-72.58806
GeoHash:
G#: drkks4qgz
GRN:
N28W40
Type:
Group of Prospects (Abandoned) - last checked 2018
Köppen climate type:
Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Portland5,862 (2017)4.6km
Cromwell13,750 (2017)4.9km
Middletown46,756 (2017)5.8km
Lake Pocotopaug3,436 (2017)6.6km
East Hampton2,691 (2017)7.2km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut19km
Bristol Gem & Mineral ClubBristol, Connecticut32km
New Haven Mineral ClubNew Haven, Connecticut42km
Mindat Locality ID:
6786
Long-form identifier:
mindat:1:2:6786:0
GUID (UUID V4):
28f31d0c-e4ca-4972-9d85-a302a0022d53


Two small prospects in narrow granitic pegmatite dike best known for its aquamarine. Minerals such as good epidote in quartz veins from the surrounding metamorphics are also included. According to Cameron et al (1954):

The pegmatite...crops out on land owned jointly by Charles F. Walker, R. F. D., Portland, and Harry L. Walker, R. F. D., Glastonbury. It may extend eastward beneath overburden to land owned by Clifford Hale, R. F. D., Portland. In 1932 two small cuts were opened on the Walker property by the Eureka Flint & Spar Co., Portland, and were worked for 3 or 4 months for feldspar. According to Mr. William Wilkes, superintendent, about 70 tons of no. 1 feldspar was recovered. Both quarries have since been idle. The upper opencut is 25 feet long, 9 feet wide, and 1 to 10 feet deep. The lower opencut is 38 feet long, 10 feet wide, and 5 to 18 feet deep. Both pits are free of water and probably contain little backfill. The prospect was mapped by E. N. Cameron and V. E. Shainin in May 1943.


The pegmatite is a tabular body at least 180 feet long and 6 to 8 feet thick. It ranges in strike from N. 79° W. to east and dips 63° to 74° SW. The dike is sharply discordant to the enclosing granite-gneiss (Monson gneiss), whose foliation strikes N. 20° W. and dips westward at moderate to steep angles. The contact between the Monson gneiss and the Bolton schist lies 60 feet west of the westernmost exposure of the pegmatite. The pegmatite does not seem to extend across the contact.

The dike, a disseminated type of beryl deposit, consists chiefly of quartz and perthite. It has a border zone and a core. The border zone is ½ to 1 inch thick and is composed of fine-grained quartz, plagioclase and tourmaline. The core consists of medium- to coarse-grained quartz and perthite with subordinate amounts of plagioclase, muscovite, and accessory beryl, tourmaline, columbite-tantalite and monazite. Monazite is rare.
Most of the beryl occurs in the core, either with small anhedral crystals of perthite scattered in a matrix of coarse quartz, plagioclase and accessory tourmaline, or with fine-grained quartz, plagioclase, and accessory tourmaline.

The beryl is green to blue-green and occurs in crystals 0.2 to 2 inches long and 0.1 to 2 inches in diameter, but most of the crystals are very small.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


18 valid minerals. 2 erroneous literature entries.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
Colour: white to tan
ⓘ Albite var. Peristerite
Formula: Na(AlSi3O8)
ⓘ 'Allanite Group' ?
Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
Description: Reference contains a list with no details.
ⓘ Almandine
Formula: Fe2+3Al2(SiO4)3
Habit: trapezohedral
Colour: red
Description: in sugary albite
ⓘ Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Colour: black
Description: fka biotite
✪ Beryl
Formula: Be3Al2(Si6O18)
Habit: elongated hexagonal prisms
Colour: yellow, green, blue-green
Description: crystals to 10 inches
ⓘ Beryl var. Aquamarine
Formula: Be3Al2Si6O18
Habit: hexagonal prisms
Colour: blue
Description: crystals to 10 inches
ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'
Habit: thin prisms
Colour: black
Description: very small
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Habit: elongated to short prisms
Colour: dark green
Description: In quartz veins in the metamorphics surrounding the pegmatites.
ⓘ Fluorapatite
Formula: Ca5(PO4)3F
Habit: prismatic
Colour: white, yellow-green, green
Fluorescence: yellow
Description: Large crystals and casts are visible in the pegmatite. Some are parallel growth clusters, ranging in color from white to light yellow-green. Chunks of these are littered everywhere in the dump. Some are up to 7 in in diameter.
ⓘ Hematite ?
Formula: Fe2O3
Description: Reference contains only a list with no details.
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ 'Limonite'
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
Habit: octahedral
Colour: black
Description: The crystals are striated with triangular markings on the octahedron faces. The magnetite at Hale-Walker Quarry has a metallic luster on the crystal faces. The broken crystal portions are a very iridescent blue-black (Albini 1979)
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
Description: Reference contains only a list with no details.
ⓘ Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6H2O
ⓘ Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
ⓘ Microcline
Formula: K(AlSi3O8)
Colour: white, tan, pink
Fluorescence: Some microcline shows moderately bright reddish to magenta fluorescence under SW UV light.
ⓘ 'Microlite Group' ?
Formula: A2-mTa2X6-wZ-n
Description: Reference contains only a list with no details.
ⓘ 'Monazite'
Formula: REE(PO4)
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Colour: silvery
ⓘ Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Description: Reference contains only a list with no details, and natrolite is questioned in the reference. Very unlikely.
ⓘ Opal
Formula: SiO2 · nH2O
Description: Reference contains only a list with no details, but it is common in all pegmatites in the district.
ⓘ Pyrite
Formula: FeS2
Habit: massive
Description: Reference contains only a list with no details.
ⓘ Quartz
Formula: SiO2
Colour: clear to smoky
ⓘ Samarskite-(Y)
Formula: YFe3+Nb2O8
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Colour: black
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
Habit: trapezohedral
Colour: orange-red
Description: Crystals to a few mm.
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z

Gallery:

Be3Al2(Si6O18)ⓘ Beryl
Be3Al2Si6O18ⓘ Beryl var. Aquamarine
(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)ⓘ Epidote
Mn2+3Al2(SiO4)3ⓘ Spessartine

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘ'Microlite Group' ?4.00.A2-mTa2X6-wZ-n
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite ?4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘOpal4.DA.10SiO2 · nH2O
ⓘSamarskite-(Y)4.DB.25YFe3+Nb2O8
Group 5 - Nitrates and Carbonates
ⓘMalachite ?5.BA.10Cu2(CO3)(OH)2
Group 8 - Phosphates, Arsenates and Vanadates
ⓘFluorapatite8.BN.05Ca5(PO4)3F
ⓘMeta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6H2O
ⓘMetatorbernite8.EB.10Cu(UO2)2(PO4)2 · 8H2O
Group 9 - Silicates
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ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)
ⓘAlbite
var. Peristerite		9.FA.35Na(AlSi3O8)
ⓘ9.FA.35Na(AlSi3O8)
ⓘNatrolite ?9.GA.05Na2Al2Si3O10 · 2H2O
Unclassified
ⓘ'Monazite'-REE(PO4)
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
ⓘ'Limonite'-
ⓘ'Columbite-(Fe)-Columbite-(Mn) Series'-
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ'Allanite Group' ?-(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)

List of minerals for each chemical element

HHydrogen
Hⓘ AnniteKFe32+(AlSi3O10)(OH)2
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ MalachiteCu2(CO3)(OH)2
Hⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Hⓘ MetatorberniteCu(UO2)2(PO4)2 · 8H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ NatroliteNa2Al2Si3O10 · 2H2O
Hⓘ OpalSiO2 · nH2O
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Hⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
BeBeryllium
Beⓘ Beryl var. AquamarineBe3Al2Si6O18
Beⓘ BerylBe3Al2(Si6O18)
BBoron
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
CCarbon
Cⓘ MalachiteCu2(CO3)(OH)2
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AnniteKFe32+(AlSi3O10)(OH)2
Oⓘ Beryl var. AquamarineBe3Al2Si6O18
Oⓘ AlmandineFe32+Al2(SiO4)3
Oⓘ BerylBe3Al2(Si6O18)
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ FluorapatiteCa5(PO4)3F
Oⓘ HematiteFe2O3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Oⓘ MetatorberniteCu(UO2)2(PO4)2 · 8H2O
Oⓘ MicroclineK(AlSi3O8)
Oⓘ MonaziteREE(PO4)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ NatroliteNa2Al2Si3O10 · 2H2O
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ⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oⓘ Albite var. PeristeriteNa(AlSi3O8)
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
FFluorine
Fⓘ FluorapatiteCa5(PO4)3F
Fⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ NatroliteNa2Al2Si3O10 · 2H2O
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naⓘ Albite var. PeristeriteNa(AlSi3O8)
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ AnniteKFe32+(AlSi3O10)(OH)2
Alⓘ Beryl var. AquamarineBe3Al2Si6O18
Alⓘ AlmandineFe32+Al2(SiO4)3
Alⓘ BerylBe3Al2(Si6O18)
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ NatroliteNa2Al2Si3O10 · 2H2O
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ Albite var. PeristeriteNa(AlSi3O8)
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ⓘ BerylBe3Al2(Si6O18)
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ NatroliteNa2Al2Si3O10 · 2H2O
Siⓘ OpalSiO2 · nH2O
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ Albite var. PeristeriteNa(AlSi3O8)
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
PPhosphorus
Pⓘ FluorapatiteCa5(PO4)3F
Pⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Pⓘ MetatorberniteCu(UO2)2(PO4)2 · 8H2O
Pⓘ MonaziteREE(PO4)
SSulfur
Sⓘ PyriteFeS2
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ⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ FluorapatiteCa5(PO4)3F
Caⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
MnManganese
Mnⓘ SpessartineMn32+Al2(SiO4)3
FeIron
Feⓘ AnniteKFe32+(AlSi3O10)(OH)2
Feⓘ AlmandineFe32+Al2(SiO4)3
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ HematiteFe2O3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ PyriteFeS2
Feⓘ Samarskite-(Y)YFe3+Nb2O8
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CuCopper
Cuⓘ MalachiteCu2(CO3)(OH)2
Cuⓘ MetatorberniteCu(UO2)2(PO4)2 · 8H2O
YYttrium
Yⓘ Samarskite-(Y)YFe3+Nb2O8
NbNiobium
Nbⓘ Samarskite-(Y)YFe3+Nb2O8
TaTantalum
Taⓘ Microlite GroupA2-mTa2X6-wZ-n
UUranium
Uⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Uⓘ MetatorberniteCu(UO2)2(PO4)2 · 8H2O

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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

Cameron, Eugene N., , (1954) Pegmatite investigations, 1942-45, in New England. Professional Paper 255. US Geological Survey doi:10.3133/pp255
Cameron, et al (1954): http://pubs.er.usgs.gov/publication/pp255
Schooner, Richard. (1955), 90 Minerals from 1 Connecticut Hill. Rocks & Minerals: 30(7-8): 351-8.
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. Fluorescent House, Branford, Connecticut.
Schooner, Richard. (1961), The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Ryerson, Kathleen. (1972), Rock Hound's Guide to Connecticut. Pequot Press.
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.
Albini, Anthony J. (1979), Selected Pegmatite Quarries of the Central Connecticut Region. Masters thesis. Central Connecticut State College, New Britain, Connecticut
Webster, Bud and Bill Shelton. (1979), Mineral Collector’s Field Guide: The Northeast.
Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
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