SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Ridgefield, Fairfield Co., Connecticut, USAi
Regional Level Types
Ridgefield- not defined -
Fairfield Co.County
ConnecticutState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Latitude & Longitude (WGS84):
41° 16' 53'' North , 73° 29' 55'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Ridgefield7,645 (2017)0.0km
Georgetown1,805 (2017)6.0km
Cannondale141 (2017)9.5km
Pound Ridge5,104 (2017)10.3km
Wilton18,062 (2017)10.8km


Ridgefield was first settled by English colonists from Norwalk and Milford in 1708, and was incorporated under a royal charter issued in 1709. Coordinates are for the town center where state Routes 35 and 102 meet.

Ridgefield has very complicated bedrock geology. Cameron's Line, a major thrust fault separating Laurentian Terrane metamorphic rocks from overthrust Connecticut Valley Terrane metamophic rocks, winds its way generally NE-SW through the lower third of town. The rocks south of the Cameron's Line are mostly Ordovician unnamed felsic orthogneiss with some of the Harrison Gneiss metadiorite in the Branchville area. North of Cameron's Line, higher elevations with rugged topography along the eastern, northern and western part of town (such as under Pine, Ned, and West Mountains), are underlain by Grenville age Laurentian gneiss bedrock. Irregular, elongated valleys with numerous lakes and swamps in the center of town are underlain by easily eroded Cambrian to Ordovician Walloomsac and Stockbridge Marbles. A overthrusted Taconic slice of Cambrian Manhattan Schist metasedimentary rock winds its way between these valleys underlying ground with intermediate elevations such as under Ridgebury and Barrow Mountains and north and east of Wataba and Fox Hill Lakes.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

46 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Habit: bladed
Colour: dark green
Description: Beautiful bladed crystals on massive actinolite from a locality near the "Stonehenge Inn".
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Albite
Formula: Na(AlSi3O8)
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.
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Description: Included in a list with no supporting details or specific locality.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Anatase
Formula: TiO2
Colour: pale brown
Description: Occurs in seams in a coarse granitic rock associated with small quartz crystals (Januzzi, 1976). No specific locality given.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
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
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Description: Included in a list of minerals with no supporting details or specific locality, but a common rock-formng mineral in the metamorphic rocks of the area.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Calcite
Formula: CaCO3
Description: Included in a list of minerals with no supporting details or specific localities, but a common mineral in the marble in the area.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Chalcopyrite
Formula: CuFeS2
Description: Included in a list of minerals with no supporting details or specific localities, though it is a common accessory in the marble of the area.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
'Chlorite Group'
Description: Included in a list of minerals with no supporting details or specific localities, though it is common in the area.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Chondrodite
Formula: (Mg,Fe2+)5(SiO4)2(F,OH)2
Description: Included in a list of minerals with no supporting information or specific localities, but it is a common accessory in area marble.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 89.
'Columbite-(Fe)-Columbite-(Mn) Series'
Colour: black
Description: "Large crystals" (Januzzi 1959)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Dolomite
Formula: CaMg(CO3)2
Description: Included in a list of minerals with no supporting information or specific localities, though it is common in area marble.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Elbaite ?
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Colour: green
Description: Included in a list of minerals with no supporting details or specific localities. Januzzi does not state that it is from the Casey Quarry.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Description: Included in a list of minerals with no supporting information or specific localities, but it is a common accessory mineral in the area.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
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
Forsterite ?
Formula: Mg2SiO4
Description: Included in a list of minerals with no supporting information or specific localities, an unusual mineral for the area.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Galena
Formula: PbS
Colour: lead gray
Description: "silvery lead-gray masses" Hiller (1971)
Reference: Hiller, John T., Jr. (1968): Rediscovered Quartz-Sulfide Prospect. Rocks and Minerals. Vol. 43, No. 8, p. 587.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 89.
Gold ?
Formula: Au
Description: Included in a list of minerals with no supporting documentation or specific localities. Few actual gold localities exist in Connecticut.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Graphite
Formula: C
Description: Included in a list of minerals with no supporting details or specific localities, however, it is a common accessory in area marble.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Hematite
Formula: Fe2O3
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Heulandite subgroup'
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Hornblende'
Reference: The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 89.
Ilmenite
Formula: Fe2+TiO3
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Kyanite
Formula: Al2(SiO4)O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Laumontite
Formula: CaAl2Si4O12 · 4H2O
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
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
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)
Reference: The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 89.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 89.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Nacrite ?
Formula: Al2(Si2O5)(OH)4
Description: No details on the find in the reference, just "found at Ridgefield".
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Opal
Formula: SiO2 · nH2O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Opal var: Opal-AN
Formula: SiO2 · nH2O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Orthoclase
Formula: K(AlSi3O8)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
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.
Pyrolusite
Formula: Mn4+O2
Description: No pyrolusite dendrite or staining in a granite pegmatite in the world has been verified as pyrolusite. The name was a mistake in the nineteenth century which has been widely publicized.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Pyroxene Group'
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Pyrrhotite
Formula: Fe7S8
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Quartz
Formula: SiO2
Reference: The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 89.
Quartz var: Agate ?
Description: Included in a list of minerals with no supporting details or specific localities.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Quartz var: Carnelian ?
Description: Included in a list of minerals with no supporting details or specific localities.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Quartz var: Chalcedony ?
Formula: SiO2
Description: Included in a list of minerals with no supporting details or specific localities.
Reference: Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Quartz var: Rose Quartz
Formula: SiO2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Rutile
Formula: TiO2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Scapolite'
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Sillimanite
Formula: Al2(SiO4)O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Sphalerite
Formula: ZnS
Reference: Hiller, John T., Jr. (1968): Rediscovered Quartz-Sulfide Prospect. Rocks and Minerals. Vol. 43, No. 8, p. 587.
Spodumene
Formula: LiAlSi2O6
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Stilbite subgroup'
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Talc
Formula: Mg3Si4O10(OH)2
Reference: The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 89.
Titanite
Formula: CaTi(SiO4)O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 89.
'Tourmaline var: Verdelite'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Uraninite
Formula: UO2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Zircon
Formula: Zr(SiO4)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
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 1 - Elements
Gold ?1.AA.05Au
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Pyrolusite ?4.DB.05Mn4+O2
Quartz4.DA.05SiO2
var: Agate ?4.DA.05SiO2
var: Carnelian ?4.DA.05SiO2
var: Chalcedony ?4.DA.05SiO2
var: Rose Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Meta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
var: Cleavelandite9.FA.35Na(AlSi3O8)
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
Chondrodite9.AF.45(Mg,Fe2+)5(SiO4)2(F,OH)2
Chrysotile9.ED.15Mg3(Si2O5)(OH)4
Elbaite ?9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Forsterite ?9.AC.05Mg2SiO4
Kyanite9.AF.15Al2(SiO4)O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Nacrite ?9.ED.05Al2(Si2O5)(OH)4
Orthoclase9.FA.30K(AlSi3O8)
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Pollucite ?9.GB.05(Cs,Na)2(Al2Si4O12) · 2H2O
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Sillimanite9.AF.05Al2(SiO4)O
Spodumene9.DA.30LiAlSi2O6
Talc9.EC.05Mg3Si4O10(OH)2
Titanite9.AG.15CaTi(SiO4)O
Topaz9.AF.35Al2(SiO4)(F,OH)2
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Zircon9.AD.30Zr(SiO4)
var: Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Garnet Group'-X3Z2(SiO4)3
'Heulandite subgroup'-
'Hornblende'-
'Lepidolite'-
'Pyroxene Group'-
'Scapolite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
'Stilbite subgroup'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
'var: Verdelite'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold ?1.1.1.1Au
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Anatase4.4.4.1TiO2
Pyrolusite ?4.4.1.4Mn4+O2
Rutile4.4.1.1TiO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
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 all cations in octahedral [6] coordination
Forsterite ?51.3.1.2Mg2SiO4
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
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Chondrodite52.3.2b.2(Mg,Fe2+)5(SiO4)2(F,OH)2
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(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 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 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
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
Elbaite ?61.3.1.8Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
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 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 1:1 layers
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(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)
Orthoclase76.1.1.1K(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Pollucite ?77.1.1.2(Cs,Na)2(Al2Si4O12) · 2H2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite
var: Cleavelandite
-Na(AlSi3O8)
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Garnet Group'-X3Z2(SiO4)3
'Heulandite subgroup'-
'Hornblende'-
'Lepidolite'-
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
Nacrite ?-Al2(Si2O5)(OH)4
Opal
var: Opal-AN
-SiO2 · nH2O
'Pyroxene Group'-
Quartz
var: Agate ?
-SiO2
var: Carnelian ?-SiO2
var: Chalcedony ?-SiO2
var: Rose Quartz-SiO2
var: Smoky Quartz-SiO2
'Scapolite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
'Stilbite subgroup'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
'var: Verdelite'-A(D3)G6(T6O18)(BO3)3X3Z
Zircon
var: Cyrtolite
-Zr[(SiO4),(OH)4]

List of minerals for each chemical element

HHydrogen
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H ChrysotileMg3(Si2O5)(OH)4
H TalcMg3Si4O10(OH)2
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H Opal (var: Opal-AN)SiO2 · nH2O
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H GypsumCaSO4 · 2H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H MalachiteCu2(CO3)(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
H TopazAl2(SiO4)(F,OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H BertranditeBe4(Si2O7)(OH)2
H Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H OpalSiO2 · nH2O
H ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
H NacriteAl2(Si2O5)(OH)4
H Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
LiLithium
Li SpodumeneLiAlSi2O6
Li ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Be BertranditeBe4(Si2O7)(OH)2
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
B Tourmaline (var: Verdelite)A(D3)G6(T6O18)(BO3)3X3Z
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
B ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C DolomiteCaMg(CO3)2
C CalciteCaCO3
C GraphiteC
C MalachiteCu2(CO3)(OH)2
OOxygen
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O DolomiteCaMg(CO3)2
O Garnet GroupX3Z2(SiO4)3
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O ChrysotileMg3(Si2O5)(OH)4
O TalcMg3Si4O10(OH)2
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O AnataseTiO2
O CalciteCaCO3
O Opal (var: Opal-AN)SiO2 · nH2O
O OrthoclaseK(AlSi3O8)
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Tourmaline (var: Verdelite)A(D3)G6(T6O18)(BO3)3X3Z
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O IlmeniteFe2+TiO3
O KyaniteAl2(SiO4)O
O LaumontiteCaAl2Si4O12 · 4H2O
O MagnetiteFe2+Fe23+O4
O MalachiteCu2(CO3)(OH)2
O Quartz (var: Rose Quartz)SiO2
O Quartz (var: Smoky Quartz)SiO2
O RutileTiO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
O SillimaniteAl2(SiO4)O
O SpodumeneLiAlSi2O6
O TitaniteCaTi(SiO4)O
O TopazAl2(SiO4)(F,OH)2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O UraniniteUO2
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O ZirconZr(SiO4)
O Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
O BertranditeBe4(Si2O7)(OH)2
O BerylBe3Al2(Si6O18)
O Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
O FluorapatiteCa5(PO4)3F
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O Albite (var: Cleavelandite)Na(AlSi3O8)
O AlbiteNa(AlSi3O8)
O OpalSiO2 · nH2O
O ForsteriteMg2SiO4
O ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
O NacriteAl2(Si2O5)(OH)4
O Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
O Quartz (var: Chalcedony)SiO2
O PyrolusiteMn4+O2
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F TopazAl2(SiO4)(F,OH)2
F Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
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 ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg DolomiteCaMg(CO3)2
Mg ChrysotileMg3(Si2O5)(OH)4
Mg TalcMg3Si4O10(OH)2
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
Mg ForsteriteMg2SiO4
AlAluminium
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al KyaniteAl2(SiO4)O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Al SillimaniteAl2(SiO4)O
Al SpodumeneLiAlSi2O6
Al TopazAl2(SiO4)(F,OH)2
Al BerylBe3Al2(Si6O18)
Al Albite (var: Cleavelandite)Na(AlSi3O8)
Al AlbiteNa(AlSi3O8)
Al ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Al NacriteAl2(Si2O5)(OH)4
Al Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
SiSilicon
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si Garnet GroupX3Z2(SiO4)3
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si ChrysotileMg3(Si2O5)(OH)4
Si TalcMg3Si4O10(OH)2
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si Opal (var: Opal-AN)SiO2 · nH2O
Si OrthoclaseK(AlSi3O8)
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si KyaniteAl2(SiO4)O
Si LaumontiteCaAl2Si4O12 · 4H2O
Si Quartz (var: Rose Quartz)SiO2
Si Quartz (var: Smoky Quartz)SiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Si SillimaniteAl2(SiO4)O
Si SpodumeneLiAlSi2O6
Si TitaniteCaTi(SiO4)O
Si TopazAl2(SiO4)(F,OH)2
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si ZirconZr(SiO4)
Si Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
Si BertranditeBe4(Si2O7)(OH)2
Si BerylBe3Al2(Si6O18)
Si Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Si Albite (var: Cleavelandite)Na(AlSi3O8)
Si AlbiteNa(AlSi3O8)
Si OpalSiO2 · nH2O
Si ForsteriteMg2SiO4
Si ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Si NacriteAl2(Si2O5)(OH)4
Si Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
Si Quartz (var: Chalcedony)SiO2
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
SSulfur
S ChalcopyriteCuFeS2
S PyrrhotiteFe7S8
S GypsumCaSO4 · 2H2O
S SphaleriteZnS
S GalenaPbS
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
K PhlogopiteKMg3(AlSi3O10)(OH)2
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
CaCalcium
Ca DolomiteCaMg(CO3)2
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca GypsumCaSO4 · 2H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca TitaniteCaTi(SiO4)O
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Ca FluorapatiteCa5(PO4)3F
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
TiTitanium
Ti AnataseTiO2
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Mn PyrolusiteMn4+O2
FeIron
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe ChalcopyriteCuFeS2
Fe PyrrhotiteFe7S8
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Zn SphaleriteZnS
ZrZirconium
Zr ZirconZr(SiO4)
Zr Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
CsCaesium
Cs Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
AuGold
Au GoldAu
PbLead
Pb GalenaPbS
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)
Manchester, J.G. (1931): The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, p. 89.
Januzzi, Ronald E. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.

Localities in this Region


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.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: September 20, 2019 08:48:27 Page generated: July 19, 2019 23:07:11
Go to top of page