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Casey Quarry (Ridgefield pegmatite), Ridgefield, Fairfield County, Connecticut, USAi
| Regional Level Types | |
|---|---|
| Casey Quarry (Ridgefield pegmatite) | Quarry |
| Ridgefield | - not defined - |
| Fairfield County | County |
| Connecticut | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 17' 40'' North , 73° 31' 1'' West
Latitude & Longitude (decimal):
Type:
Kรถppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ridgefield | 7,645 (2017) | 2.2km |
| Georgetown | 1,805 (2017) | 8.1km |
| Peach Lake | 1,629 (2017) | 9.6km |
| Pound Ridge | 5,104 (2017) | 10.7km |
| Cannondale | 141 (2017) | 11.6km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Danbury Mineralogical Society | Danbury, Connecticut | 12km |
| Stamford Mineralogical Society | Stamford, Connecticut | 27km |
| Nassau Mineral Club | Glen Cove, New York | 49km |
| New Haven Mineral Club | New Haven, Connecticut | 49km |
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.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| โ Albite Formula: Na(AlSi3O8) Habit: anhedral Colour: white |
| โ Albite var. Cleavelandite Formula: Na(AlSi3O8) Habit: tabular, radiating aggregates Colour: white to pale blue |
| โ 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. References: |
| โ Beryl Formula: Be3Al2(Si6O18) Habit: hexagonal prismatic Colour: cream to greenish Description: Webster (1978) writes that quarry is noted for its beryl. References: |
| โ 'Columbite-(Fe)-Columbite-(Mn) Series' Colour: black Description: "Large crystals" (Januzzi 1959) |
| โ 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). |
| โ 'Garnet Group' Formula: X3Z2(SiO4)3 Description: references provide no details, but occurrence plausible. |
| โ '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) References: |
| โ Meta-autunite Formula: Ca(UO2)2(PO4)2 · 6H2O Habit: flaky encrustation Colour: pale yellow Fluorescence: green Description: typically as pale yellow flakes and encrustations associated with uraninite or its other secondary minerals. |
| โ Microcline Formula: K(AlSi3O8) Description: References provide no details, but its presence is certain in a granite pegmatite. |
| โ Muscovite Formula: KAl2(AlSi3O10)(OH)2 References: |
| โ Opal Formula: SiO2 · nH2O Fluorescence: green Description: References provide no details but it is common in Connecticut pegmatites. |
| โ Opal var. Opal-AN Formula: SiO2 · nH2O Fluorescence: green Description: References provide no details but it is common in Connecticut pegmatites. |
| โ 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). |
| โ 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. |
| โ Schorl Formula: NaFe2+3Al6(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. |
| โ 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 โฆ It is undoubtedly scarce" Januzzi (1959). References: |
| โ 'Stilbite Subgroup' Formula: M6-7[Al8-9Si27-28O72] · nH2O Description: References provides no details - presence reported by late noted collector Marcelle Weber. |
| โ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
| โ Uraninite Formula: UO2 Colour: black |
| โ Uranophane Formula: Ca(UO2)2(SiO3OH)2 · 5H2O Habit: earthy pseudomorphs after uraninite Colour: pale yellow-white |
| โ Zircon Formula: Zr(SiO4) |
| โ 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. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| โ | Quartz | 4.DA.05 | SiO2 |
| โ | Opal var. Opal-AN | 4.DA.10 | SiO2 ยท nH2O |
| โ | 4.DA.10 | SiO2 ยท nH2O | |
| โ | Uraninite | 4.DL.05 | UO2 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| โ | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
| โ | Meta-autunite | 8.EB.10 | Ca(UO2)2(PO4)2 ยท 6H2O |
| Group 9 - Silicates | |||
| โ | Zircon | 9.AD.30 | Zr(SiO4) |
| โ | var. Cyrtolite | 9.AD.30 | Zr[(SiO4),(OH)4] |
| โ | Uranophane | 9.AK.15 | Ca(UO2)2(SiO3OH)2 ยท 5H2O |
| โ | Bertrandite | 9.BD.05 | Be4(Si2O7)(OH)2 |
| โ | Beryl | 9.CJ.05 | Be3Al2(Si6O18) |
| โ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| โ | Spodumene | 9.DA.30 | LiAlSi2O6 |
| โ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| โ | Microcline | 9.FA.30 | K(AlSi3O8) |
| โ | Albite | 9.FA.35 | Na(AlSi3O8) |
| โ | var. Cleavelandite | 9.FA.35 | Na(AlSi3O8) |
| โ | Pollucite ? | 9.GB.05 | (Cs,Na)2(Al2Si4O12) ยท 2H2O |
| Unclassified | |||
| โ | 'Lepidolite' | - | |
| โ | 'Stilbite Subgroup' | - | M6-7[Al8-9Si27-28O72] ยท nH2O |
| โ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
| โ | 'Columbite-(Fe)-Columbite-(Mn) Series' | - | |
| โ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | โ Bertrandite | Be4(Si2O7)(OH)2 |
| H | โ Opal var. Opal-AN | SiO2 · nH2O |
| H | โ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| H | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | โ Opal | SiO2 · nH2O |
| H | โ Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| H | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | โ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| H | โ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| H | โ Zircon var. Cyrtolite | Zr[(SiO4),(OH)4] |
| Li | Lithium | |
| Li | โ Spodumene | LiAlSi2O6 |
| Be | Beryllium | |
| Be | โ Bertrandite | Be4(Si2O7)(OH)2 |
| Be | โ Beryl | Be3Al2(Si6O18) |
| B | Boron | |
| B | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | โ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | Oxygen | |
| O | โ Albite | Na(AlSi3O8) |
| O | โ Bertrandite | Be4(Si2O7)(OH)2 |
| O | โ Beryl | Be3Al2(Si6O18) |
| O | โ Fluorapatite | Ca5(PO4)3F |
| O | โ Opal var. Opal-AN | SiO2 · nH2O |
| O | โ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| O | โ Microcline | K(AlSi3O8) |
| O | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | โ Opal | SiO2 · nH2O |
| O | โ Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| O | โ Quartz | SiO2 |
| O | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | โ Spodumene | LiAlSi2O6 |
| O | โ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| O | โ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | โ Uraninite | UO2 |
| O | โ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| O | โ Zircon | Zr(SiO4) |
| O | โ Zircon var. Cyrtolite | Zr[(SiO4),(OH)4] |
| O | โ Albite var. Cleavelandite | Na(AlSi3O8) |
| O | โ Columbite-(Fe)-Columbite-(Mn) Series | |
| O | โ Garnet Group | X3Z2(SiO4)3 |
| F | Fluorine | |
| F | โ Fluorapatite | Ca5(PO4)3F |
| Na | Sodium | |
| Na | โ Albite | Na(AlSi3O8) |
| Na | โ Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| Na | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Na | โ Albite var. Cleavelandite | Na(AlSi3O8) |
| Al | Aluminium | |
| Al | โ Albite | Na(AlSi3O8) |
| Al | โ Beryl | Be3Al2(Si6O18) |
| Al | โ Microcline | K(AlSi3O8) |
| Al | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | โ Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| Al | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | โ Spodumene | LiAlSi2O6 |
| Al | โ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| Al | โ Albite var. Cleavelandite | Na(AlSi3O8) |
| Si | Silicon | |
| Si | โ Albite | Na(AlSi3O8) |
| Si | โ Bertrandite | Be4(Si2O7)(OH)2 |
| Si | โ Beryl | Be3Al2(Si6O18) |
| Si | โ Opal var. Opal-AN | SiO2 · nH2O |
| Si | โ Microcline | K(AlSi3O8) |
| Si | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | โ Opal | SiO2 · nH2O |
| Si | โ Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| Si | โ Quartz | SiO2 |
| Si | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | โ Spodumene | LiAlSi2O6 |
| Si | โ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| Si | โ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| Si | โ Zircon | Zr(SiO4) |
| Si | โ Zircon var. Cyrtolite | Zr[(SiO4),(OH)4] |
| Si | โ Albite var. Cleavelandite | Na(AlSi3O8) |
| Si | โ Garnet Group | X3Z2(SiO4)3 |
| P | Phosphorus | |
| P | โ Fluorapatite | Ca5(PO4)3F |
| P | โ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| K | Potassium | |
| K | โ Microcline | K(AlSi3O8) |
| K | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | โ Fluorapatite | Ca5(PO4)3F |
| Ca | โ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| Ca | โ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| Mn | Manganese | |
| Mn | โ Columbite-(Fe)-Columbite-(Mn) Series | |
| Fe | Iron | |
| Fe | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Fe | โ Columbite-(Fe)-Columbite-(Mn) Series | |
| Zr | Zirconium | |
| Zr | โ Zircon | Zr(SiO4) |
| Zr | โ Zircon var. Cyrtolite | Zr[(SiO4),(OH)4] |
| Nb | Niobium | |
| Nb | โ Columbite-(Fe)-Columbite-(Mn) Series | |
| Cs | Caesium | |
| Cs | โ Pollucite | (Cs,Na)2(Al2Si4O12) · 2H2O |
| U | Uranium | |
| U | โ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| U | โ Uraninite | UO2 |
| U | โ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
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Casey Quarry, Ridgefield, Fairfield County, Connecticut, USA