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Branford, New Haven County, Connecticut, USAi
Regional Level Types
BranfordTown
New Haven CountyCounty
ConnecticutState
USACountry

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Latitude & Longitude (WGS84):
41° 16' 45'' North , 72° 48' 53'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
47232
Long-form identifier:
1:2:47232:5
GUID (UUID V4):
963eda03-564b-4412-ad34-021b9a9fe459


A populated place (town).

Select Mineral List Type

Standard Detailed Gallery Strunz 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

21 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

β“˜ Albite
Formula: Na(AlSi3O8)
Reference: Schairer, John Frank (1931): The Minerals of Connecticut(State Geological and Natural History Survey Bulletin 51)
β“˜ Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10068042.
β“˜ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Gems and Minerals of America - Jay Ellis Ransom-1974
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Reference: Schairer, John Frank (1931): The Minerals of Connecticut(State Geological and Natural History Survey Bulletin 51)
β“˜ Calcite
Formula: CaCO3
Habit: cleavable masses
Colour: salmon orange
Fluorescence: orange-red best under SW UV
Description: Primary material as cleavable masses in a calc-silicate assemblage in the Plainfield Formation adjacent to the granite. Secondary material in clefts with quartz, chalcedony, and talc, mostly naturally dissolved away.
Reference: Schairer, John Frank. (1931) The Minerals of Connecticut: State Geological and Natural History Survey Bulletin 51.
β“˜ Diopside
Formula: CaMgSi2O6
Habit: grains
Colour: dark green
Description: Found in a calc-silicate rock assemblage in the Plainfield Formation next to the granite. Species inferred from the properties, color and chemistry of the assemblage.
Reference: Harold Moritz collection
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Colour: olive green
Description: Granular material a calc-silicate assemblage in the Plainfield Formation adjacent to the granite.
Reference: Foye, 1949. The Geology of Eastern CT, p.83
β“˜ Fluorapatite
Formula: Ca5(PO4)3F
Reference: Dana 6:767.
β“˜ Fluorite
Formula: CaF2
Reference: Foye, 1949. The Geology of Eastern CT, p.83
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Schairer, John Frank (1931): The Minerals of Connecticut(State Geological and Natural History Survey Bulletin 51)
β“˜ Grossular
Formula: Ca3Al2(SiO4)3
Habit: dodecahedral
Colour: dark brown
Description: Crystals and grains in a calc-silicate assemblage in the Plainfield Formation adjacent to the granite.
Reference: Harold Moritz collection
β“˜ 'Heulandite Subgroup'
Habit: coffin-shaped
Colour: colorless
Description: crystals to 13mm with stilbite, calcite, prehnite, pectolite
Reference: Former Alfred E. Hammer collection
β“˜ 'Hornblende'
Reference: Schairer, John Frank (1931): The Minerals of Connecticut(State Geological and Natural History Survey Bulletin 51)
β“˜ 'Limonite'
Reference: Schairer, John Frank (1931): The Minerals of Connecticut(State Geological and Natural History Survey Bulletin 51)
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
Reference: Foye, 1949. The Geology of Eastern CT, p.83
β“˜ Microcline
Formula: K(AlSi3O8)
Reference: Foye, 1949. The Geology of Eastern CT, p.83
β“˜ 'Monazite'
Formula: REE(PO4)
Reference: Schairer, John Frank (1931): The Minerals of Connecticut(State Geological and Natural History Survey Bulletin 51)
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Schairer, John Frank (1931): The Minerals of Connecticut(State Geological and Natural History Survey Bulletin 51)
β“˜ Opal
Formula: SiO2 · nH2O
Habit: thin films
Colour: colorless
Fluorescence: green under all UV wavelengths
Description: Coating fractures in a calc-silicate assemblage in the Plainfield Formation adjacent to the granite.
Reference: Harold Moritz collection
β“˜ Opal var. Opal-AN
Formula: SiO2 · nH2O
Habit: thin films
Colour: colorless
Fluorescence: green under all UV wavelengths
Description: Coating fractures in a calc-silicate assemblage in the Plainfield Formation adjacent to the granite.
Reference: Harold Moritz collection
β“˜ Orthoclase
Formula: K(AlSi3O8)
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10068042.
β“˜ Pectolite
Formula: NaCa2Si3O8(OH)
Habit: acicular, radiating
Colour: white
Description: stilbite, calcite, prehnite, heulandite
Reference: Former Alfred E. Hammer collection
β“˜ Prehnite
Formula: Ca2Al2Si3O10(OH)2
Habit: botryoidal aggregates
Colour: pale green
Description: with stilbite, calcite, heulandite, pectolite
Reference: Former Alfred E. Hammer collection
β“˜ Pyrite
Formula: FeS2
Habit: cubic
Description: Tiny crystals in a calc-silicate assemblage in the Plainfield Formation adjacent to the granite.
Reference: Foye, 1949. The Geology of Eastern CT, p.83
β“˜ Quartz
Formula: SiO2
Habit: elongated prisms
Colour: colorless to gray
Description: Most material occurs as primary grains in the granite gneiss, but crystals to 1.5 cm can be found in clefts with calcite, chalcedony, talc and stilbite. Also massive material in a calc-silicate assemblage in the Plainfield Formation adjacent to the granite.
Reference: Foye, 1949. The Geology of Eastern CT, p.83
β“˜ Quartz var. Chalcedony
Formula: SiO2
Habit: massive
Colour: pale orange
Description: Late cleft-filling material with quartz, talc and probably calcite that later dissolved away.
Reference: Harold Moritz collection
β“˜ 'Scapolite'
Colour: very pale green
Fluorescence: magenta-red under SW UV
Description: Massive to granular material in a calc-silicate assemblage in the Plainfield Formation adjacent to the granite.
Reference: Harold Moritz collection
β“˜ Spodumene
Formula: LiAlSi2O6
Reference: Gems and Minerals of America - Jay Ellis Ransom-1974
β“˜ Stilbite-Ca
Formula: NaCa4(Si27Al9)O72 · 28H2O
Habit: elongated tabular
Colour: tan
Description: crystals to 7 mm, with heulandite, calcite, prehnite, pectolite
Reference: Former Alfred E. Hammer collection
β“˜ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
Habit: half or complete bow tie aggregates
Colour: brown
Description: Microcrystals in clefts with quartz and talc.
Reference: Harold Moritz collection
β“˜ Talc
Formula: Mg3Si4O10(OH)2
Habit: spherical microaggregates
Colour: pale green
Description: As microaggregates in clefts with quartz, calcite, chalcedony, stilbite and as films along sheared fractures.
Reference: Harold Moritz collection
β“˜ Zircon
Formula: Zr(SiO4)
Description: As grains in the granite and pegmatite.
Reference: Foye, 1949. The Geology of Eastern CT, p.83
β“˜ Zoisite ?
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Reference: Schairer, John Frank (1931): The Minerals of Connecticut(State Geological and Natural History Survey Bulletin 51)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Pyrite2.EB.05aFeS2
Group 3 - Halides
β“˜Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Opal4.DA.10SiO2 Β· nH2O
β“˜var. Opal-AN4.DA.10SiO2 Β· nH2O
β“˜Quartz4.DA.05SiO2
β“˜var. Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
β“˜Albite9.FA.35Na(AlSi3O8)
β“˜var. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
β“˜Diopside9.DA.15CaMgSi2O6
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Grossular9.AD.25Ca3Al2(SiO4)3
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Orthoclase9.FA.30K(AlSi3O8)
β“˜Pectolite9.DG.05NaCa2Si3O8(OH)
β“˜Prehnite9.DP.20Ca2Al2Si3O10(OH)2
β“˜Spodumene9.DA.30LiAlSi2O6
β“˜Stilbite-Ca9.GE.10NaCa4(Si27Al9)O72 Β· 28H2O
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Zircon9.AD.30Zr(SiO4)
β“˜Zoisite ?9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Unclassified Minerals, Rocks, etc.
β“˜'Apatite'-Ca5(PO4)3(Cl/F/OH)
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
β“˜'Garnet Group'-X3Z2(SiO4)3
β“˜'Heulandite Subgroup'-
β“˜'Hornblende'-
β“˜'Limonite'-
β“˜'Monazite'-REE(PO4)
β“˜'Scapolite'-
β“˜'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] Β· nH2O

List of minerals for each chemical element

HHydrogen
Hβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Hβ“˜ Stilbite-CaNaCa4(Si27Al9)O72 · 28H2O
Hβ“˜ PectoliteNaCa2Si3O8(OH)
Hβ“˜ PrehniteCa2Al2Si3O10(OH)2
Hβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Hβ“˜ TalcMg3Si4O10(OH)2
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ Opal var. Opal-ANSiO2 · nH2O
Hβ“˜ OpalSiO2 · nH2O
Hβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
LiLithium
Liβ“˜ SpodumeneLiAlSi2O6
CCarbon
Cβ“˜ CalciteCaCO3
OOxygen
Oβ“˜ FluorapatiteCa5(PO4)3F
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ QuartzSiO2
Oβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Oβ“˜ SpodumeneLiAlSi2O6
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Oβ“˜ MonaziteREE(PO4)
Oβ“˜ Garnet GroupX3Z2(SiO4)3
Oβ“˜ Stilbite-CaNaCa4(Si27Al9)O72 · 28H2O
Oβ“˜ PectoliteNaCa2Si3O8(OH)
Oβ“˜ PrehniteCa2Al2Si3O10(OH)2
Oβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ GrossularCa3Al2(SiO4)3
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ ZirconZr(SiO4)
Oβ“˜ CalciteCaCO3
Oβ“˜ Quartz var. ChalcedonySiO2
Oβ“˜ Opal var. Opal-ANSiO2 · nH2O
Oβ“˜ OpalSiO2 · nH2O
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Oβ“˜ OrthoclaseK(AlSi3O8)
Oβ“˜ DiopsideCaMgSi2O6
Oβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
FFluorine
Fβ“˜ FluorapatiteCa5(PO4)3F
Fβ“˜ FluoriteCaF2
Fβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ Stilbite-CaNaCa4(Si27Al9)O72 · 28H2O
Naβ“˜ PectoliteNaCa2Si3O8(OH)
Naβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Mgβ“˜ TalcMg3Si4O10(OH)2
Mgβ“˜ DiopsideCaMgSi2O6
AlAluminium
Alβ“˜ SpodumeneLiAlSi2O6
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Alβ“˜ Stilbite-CaNaCa4(Si27Al9)O72 · 28H2O
Alβ“˜ PrehniteCa2Al2Si3O10(OH)2
Alβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Alβ“˜ GrossularCa3Al2(SiO4)3
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Alβ“˜ OrthoclaseK(AlSi3O8)
Alβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
SiSilicon
Siβ“˜ QuartzSiO2
Siβ“˜ SpodumeneLiAlSi2O6
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Siβ“˜ Garnet GroupX3Z2(SiO4)3
Siβ“˜ Stilbite-CaNaCa4(Si27Al9)O72 · 28H2O
Siβ“˜ PectoliteNaCa2Si3O8(OH)
Siβ“˜ PrehniteCa2Al2Si3O10(OH)2
Siβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siβ“˜ TalcMg3Si4O10(OH)2
Siβ“˜ GrossularCa3Al2(SiO4)3
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ ZirconZr(SiO4)
Siβ“˜ Quartz var. ChalcedonySiO2
Siβ“˜ Opal var. Opal-ANSiO2 · nH2O
Siβ“˜ OpalSiO2 · nH2O
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Siβ“˜ OrthoclaseK(AlSi3O8)
Siβ“˜ DiopsideCaMgSi2O6
Siβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
PPhosphorus
Pβ“˜ FluorapatiteCa5(PO4)3F
Pβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Pβ“˜ MonaziteREE(PO4)
SSulfur
Sβ“˜ PyriteFeS2
ClChlorine
Clβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ OrthoclaseK(AlSi3O8)
CaCalcium
Caβ“˜ FluorapatiteCa5(PO4)3F
Caβ“˜ FluoriteCaF2
Caβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Caβ“˜ Stilbite-CaNaCa4(Si27Al9)O72 · 28H2O
Caβ“˜ PectoliteNaCa2Si3O8(OH)
Caβ“˜ PrehniteCa2Al2Si3O10(OH)2
Caβ“˜ GrossularCa3Al2(SiO4)3
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ CalciteCaCO3
Caβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Caβ“˜ DiopsideCaMgSi2O6
Caβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
FeIron
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ PyriteFeS2
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ZrZirconium
Zrβ“˜ ZirconZr(SiO4)

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