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State Route 133, Brookfield, Fairfield County, Connecticut, USAi
Regional Level Types
State Route 133Road Cutting
Brookfield- not defined -
Fairfield CountyCounty
ConnecticutState
USACountry

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Latitude & Longitude (WGS84):
41° North , 73° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~4km
GRN:
N28W40
Type:
Road Cutting
KΓΆppen climate type:
Cfa : Humid subtropical climate
Mindat Locality ID:
105841
Long-form identifier:
mindat:1:2:105841:6
GUID (UUID V4):
c1415b84-8c23-4a23-b25a-c29f4611227b


Rock exposed during roadway construction. Several small pegmatites produced small but nice specimens of bertrandite and columbite. The bertrandite exhibits excellent crystal form, just as good as the Biermann's Quarry samples, but it does not form pseudomorphs after beryl.

Notes and specimens from the late Ronald Januzzi collection indicate there was a "anatase area" containing thin Alpine clefts in gneiss lined with albite, quartz and a few fluorite crystals (no anatase found).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


11 valid minerals.

Detailed Mineral List:

β“˜ Albite
Formula: Na(AlSi3O8)
Habit: blocky to tabular
Colour: white
Description: As a coarse-grained component of pegmatites, and fine-grained component of gneiss. Micro-crystals lining Alpine clefts with micro-quartz and fluorite.
β“˜ Almandine
Formula: Fe2+3Al2(SiO4)3
β“˜ Bertrandite
Formula: Be4(Si2O7)(OH)2
β“˜ Beryl
Formula: Be3Al2(Si6O18)
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ 'Columbite-(Fe)-Columbite-(Mn) Series'
β“˜ Fluorite
Formula: CaF2
Habit: rough octahedron
Colour: colorless
Description: Micro-crystals in Alpine clefts with micro-albite and quartz.
β“˜ 'Gummite'
β“˜ 'Limonite'
β“˜ Microcline
Formula: K(AlSi3O8)
β“˜ Mitridatite ?
Formula: Ca2Fe3+3(PO4)3O2 · 3H2O
Habit: Druzy
Description: I'm pretty sure that the yellow druzy mineralization in the pegmatite is Mitridatite. I can't definatively be sure.
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Orthoclase
Formula: K(AlSi3O8)
β“˜ Quartz
Formula: SiO2
Habit: elongated prisms
Colour: pale smoky
Description: As a coarse-grained component of pegmatites and as a fine-grained component of gneiss. Micro-crystals lining Alpine clefts with micro-albite and fluorite.
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
β“˜Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Mitridatite ?8.DH.30Ca2Fe3+3(PO4)3O2 Β· 3H2O
Group 9 - Silicates
β“˜Almandine9.AD.25Fe2+3Al2(SiO4)3
β“˜Bertrandite9.BD.05Be4(Si2O7)(OH)2
β“˜Beryl9.CJ.05Be3Al2(Si6O18)
β“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Orthoclase9.FA.30K(AlSi3O8)
β“˜Albite9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Gummite'-
β“˜'Limonite'-
β“˜'Columbite-(Fe)-Columbite-(Mn) Series'-

List of minerals for each chemical element

HHydrogen
Hβ“˜ BertranditeBe4(Si2O7)(OH)2
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Beβ“˜ BertranditeBe4(Si2O7)(OH)2
Beβ“˜ BerylBe3Al2(Si6O18)
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ AlmandineFe32+Al2(SiO4)3
Oβ“˜ BertranditeBe4(Si2O7)(OH)2
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ BerylBe3Al2(Si6O18)
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ OrthoclaseK(AlSi3O8)
Oβ“˜ QuartzSiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fβ“˜ FluoriteCaF2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AlmandineFe32+Al2(SiO4)3
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ BerylBe3Al2(Si6O18)
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ OrthoclaseK(AlSi3O8)
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ AlmandineFe32+Al2(SiO4)3
Siβ“˜ BertranditeBe4(Si2O7)(OH)2
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ BerylBe3Al2(Si6O18)
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ OrthoclaseK(AlSi3O8)
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
PPhosphorus
Pβ“˜ MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ OrthoclaseK(AlSi3O8)
CaCalcium
Caβ“˜ FluoriteCaF2
Caβ“˜ MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feβ“˜ AlmandineFe32+Al2(SiO4)3
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)

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