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Casey Quarry (Ridgefield pegmatite), Ridgefield, Fairfield Co., Connecticut, USAi
Regional Level Types
Casey Quarry (Ridgefield pegmatite)Quarry
Ridgefield- not defined -
Fairfield Co.County
ConnecticutState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 17' 35'' North , 73° 30' 59'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Ridgefield7,645 (2017)2.0km
Georgetown1,805 (2017)8.0km
Peach Lake1,629 (2017)9.7km
Pound Ridge5,104 (2017)10.6km
Cannondale141 (2017)11.4km


Very little has been written about the history and geology of this granite pegmatite. The small workings consist of an upper and a lower quarry, it reportedly was first worked some time in the 19th century, and then in 1954 it was quarried for beryl. Nothing seems to have been done there since, other than specimen collecting. The information on mineralogy comes from collecting guides (mostly just lists), the most detail is given by Januzzi (1959), and private collections. It is now controlled by a local land conservation group.

The mineralogy and pegmatite zoning is similar in many ways to the nearby, and probably genetically related, Fillow quarry pegmatite, though it lacks lithophilite and its alterations.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


15 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Habit: anhedral
Colour: white
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Albite var: Cleavelandite
Formula: Na(AlSi3O8)
Habit: tabular, radiating aggregates
Colour: white to pale blue
Reference: Januzzi, Ronald. (1959): The Minerals of Western Connecticut and Southeastern New York. The Mineralogical Press, Danbury, Connecticut.
Bertrandite
Formula: Be4(Si2O7)(OH)2
Habit: micro crystals replacing beryl
Colour: colorless to pale gray or brown
Description: Found in voids formerly occupied by beryl crystals, rust-stained and associated with micro quartz. Heavy cleaning will reveal the bertrandite.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State; Rocks & Minerals (1995) 70:396-409
Beryl
Formula: Be3Al2(Si6O18)
Habit: hexagonal prismatic
Colour: cream to greenish
Description: Webster (1978) writes that quarry is noted for its beryl.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State; Rocks & Minerals (1995) 70:396-409; - Webster, Bud. (1978) MINERAL COLLECTOR’S FIELD GUIDE CONNECTICUT
'Columbite-(Fe)-Columbite-(Mn) Series'
Colour: black
Description: "Large crystals" (Januzzi 1959)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Fluorapatite
Formula: Ca5(PO4)3F
Colour: blue-green, lilac
Description: "The author has collected tiny lilac apatite crystals at the Ridgefield pegmatite off Ramapoo Road; as far as is known, these are the only apatites having this color that have been discovered in the Western Highlands of Connecticut." Januzzi (1994).
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Garnet Group'
Formula: X3Z2(SiO4)3
Description: references provide no details, but occurrence plausible.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Lepidolite'
Habit: platy
Colour: lilac
Description: "the lepidolite occurs as small, lilac plates in cleavelandite but no granular masses were reported. It does not appear to be very plentiful at these two localities. The material was optically tested by Dr. Brian Mason, Curator of Mineralogy at the American Museum of Natural History, New York." Januzzi (1959)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State; Rocks & Minerals (1995) 70:396-409
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Habit: flaky encrustation
Colour: pale yellow
Fluorescence: green
Description: typically as pale yellow flakes and encrustations associated with uraninite or its other secondary minerals.
Reference: Ronald Januzzi collection; - Januzzi, Ronald. (1959): The Minerals of Western Connecticut and Southeastern New York. The Mineralogical Press, Danbury, Connecticut.
Microcline
Formula: K(AlSi3O8)
Description: References provide no details, but its presence is certain in a granite pegmatite.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Ronald Januzzi (1959) and collection
Opal
Formula: SiO2 · nH2O
Fluorescence: green
Description: References provide no details but it is common in Connecticut pegmatites.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Opal var: Opal-AN
Formula: SiO2 · nH2O
Fluorescence: green
Description: References provide no details but it is common in Connecticut pegmatites.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Pollucite ?
Formula: (Cs,Na)2(Al2Si4O12) · 2H2O
Description: "reported from the Ridgefield pegmatite although no confirmation of the find has been officially recorded" Januzzi (1959).
Reference: Januzzi, R.E. and Seaman, David M. (1976) Mineral Localities Of Connecticut and Southern New York State and Pegmatite Minerals of the World.
Quartz
Formula: SiO2
Habit: hexagonal prismatic
Colour: white to smoky
Description: Although common as anhedral masses, euhedral crystals are found in the rare pocket or as tiny crystals associated with bertrandite in cavities formed by the dissolution of beryl.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Habit: radiating acicular or stout prisms
Colour: very dark brown to black
Fluorescence: none
Description: radiating crystals to several cm, often in parallel pairs, found in quartz in contact with cleavelandite.
Reference: Rocks & Minerals (1995) 70:396-409
Spodumene
Formula: LiAlSi2O6
Habit: tabular, short prisms with dome termination
Colour: tan
Fluorescence: pale yellow to pale orange
Description: "The author has found a single specimen of spodumene at the Ridgefield Pegmatite … It is undoubtedly scarce" Januzzi (1959).
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State; Rocks & Minerals (1995) 70:396-409
'Stilbite subgroup'
Description: References provides no details - presence reported by late noted collector Marcelle Weber.
Reference: Tschernich (1992) Zeolites of the World, p. 474; Rocks & Minerals (1995) 70:396-409
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Uraninite
Formula: UO2
Colour: black
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Habit: earthy pseudomorphs after uraninite
Colour: pale yellow-white
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Zircon
Formula: Zr(SiO4)
Reference: Ryerson Kathleen H. (1972): Rock Hounds Guide to Connecticut. The Pequot Press
Zircon var: Cyrtolite
Formula: Zr[(SiO4),(OH)4]
Habit: aggregates of curved prismatic crystals
Colour: brown
Description: "One large specimen [of cyrtolite], coated with uranium minerals, was found...by the author." Januzzi (1959). Occurs at the core of radiating cleavelandite crystals, in a similar mode of occurence as at the nearby Fillow quarry.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
Uraninite4.DL.05UO2
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Meta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var: Cleavelandite9.FA.35Na(AlSi3O8)
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Pollucite ?9.GB.05(Cs,Na)2(Al2Si4O12) · 2H2O
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spodumene9.DA.30LiAlSi2O6
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Zircon9.AD.30Zr(SiO4)
var: Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
Unclassified Minerals, Rocks, etc.
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Garnet Group'-X3Z2(SiO4)3
'Lepidolite'-
'Stilbite subgroup'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Meta-autunite40.2a.1.2Ca(UO2)2(PO4)2 · 6-8H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
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 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 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 borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Spodumene65.1.4.1LiAlSi2O6
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
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
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Pollucite ?77.1.1.2(Cs,Na)2(Al2Si4O12) · 2H2O
Unclassified Minerals, Mixtures, etc.
Albite
var: Cleavelandite
-Na(AlSi3O8)
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Garnet Group'-X3Z2(SiO4)3
'Lepidolite'-
Opal
var: Opal-AN
-SiO2 · nH2O
'Stilbite subgroup'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
Zircon
var: Cyrtolite
-Zr[(SiO4),(OH)4]

List of minerals for each chemical element

HHydrogen
H BertranditeBe4(Si2O7)(OH)2
H Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
H Opal (var: Opal-AN)SiO2 · nH2O
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H OpalSiO2 · nH2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
LiLithium
Li SpodumeneLiAlSi2O6
BeBeryllium
Be BertranditeBe4(Si2O7)(OH)2
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O BertranditeBe4(Si2O7)(OH)2
O BerylBe3Al2(Si6O18)
O Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
O FluorapatiteCa5(PO4)3F
O Garnet GroupX3Z2(SiO4)3
O Opal (var: Opal-AN)SiO2 · nH2O
O MicroclineK(AlSi3O8)
O QuartzSiO2
O SpodumeneLiAlSi2O6
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O UraniniteUO2
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O Albite (var: Cleavelandite)Na(AlSi3O8)
O ZirconZr(SiO4)
O OpalSiO2 · nH2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O AlbiteNa(AlSi3O8)
O Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
FFluorine
F FluorapatiteCa5(PO4)3F
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Albite (var: Cleavelandite)Na(AlSi3O8)
Na AlbiteNa(AlSi3O8)
Na Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
AlAluminium
Al BerylBe3Al2(Si6O18)
Al MicroclineK(AlSi3O8)
Al SpodumeneLiAlSi2O6
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Albite (var: Cleavelandite)Na(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al AlbiteNa(AlSi3O8)
Al Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
SiSilicon
Si BertranditeBe4(Si2O7)(OH)2
Si BerylBe3Al2(Si6O18)
Si Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Si Garnet GroupX3Z2(SiO4)3
Si Opal (var: Opal-AN)SiO2 · nH2O
Si MicroclineK(AlSi3O8)
Si QuartzSiO2
Si SpodumeneLiAlSi2O6
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Albite (var: Cleavelandite)Na(AlSi3O8)
Si ZirconZr(SiO4)
Si OpalSiO2 · nH2O
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si AlbiteNa(AlSi3O8)
Si Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
KPotassium
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca FluorapatiteCa5(PO4)3F
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
FeIron
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
ZrZirconium
Zr Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Zr ZirconZr(SiO4)
CsCaesium
Cs Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
UUranium
U UraniniteUO2
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
U Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Elwell, Wilbur. (1937): Some Old Localities in Connecticut. Rocks and Minerals: 12(9): 270-1.
Januzzi, Ronald E. (1959): The Minerals of Western Connecticut and Southeastern New York. The Mineralogical Press, Danbury, Connecticut.
Jones, Robert W. Jr., (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.
Hiller, John, Jr. (1971): Connecticut Mines and Minerals. Privately published.
Ryerson Kathleen H. (1972): Rock Hounds Guide to Connecticut. The Pequot Press.
Henderson, William A., Jr. (1975), The Bertrandites of Connecticut. The Mineralogical Record: 6(3): 114-123.


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