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Chester Emery Mines, Chester, Hampden County, Massachusetts, USAi
Regional Level Types
Chester Emery MinesGroup of Mines
ChesterTown
Hampden CountyCounty
MassachusettsState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
42° 16' 12'' North , 73° 0' 4'' West
Latitude & Longitude (decimal):
42.27005,-73.00119
GeoHash:
G#: drs06z40v
GRN:
N29W39
Type:
Group of Mines
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Chester627 (2017)2.1km
Middlefield551 (2017)8.8km
Becket1,786 (2017)9.6km
Huntington936 (2017)11.0km
Otis1,389 (2017)11.3km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Connecticut Valley Mineral ClubSpringfield, Massachusetts39km
Northern Berkshire Mineral ClubNorth Adams, Massachusetts49km
Mindat Locality ID:
3827
Long-form identifier:
mindat:1:2:3827:3
GUID (UUID V4):
47eab15c-2225-4725-b8af-f6d29f5bb9a5


A group of emery mines located in the town of Chester, Massachusetts. The early history of the deposit was described by Lewis (1896):

"In 1864, the occurrence of emery at Chester, Massachusetts was predicted by Dr. C. T. Jackson from his discovery of margarite there -- a mineral which Dr. J. L. Smith had just found characteristic of the emery deposits of Asia Minor. On September 6th of the same year, Dr. H. S. Lucas discovered the emery in what had before been considered only deposits of magnetic iron ore. Two years later, distinct crystals of corundum were found in the same deposits. The discovery of emery soon led to the establishment of active mining, the first of its kind in America."


This is the type locality for the mineral amesite, named for one of the original mine owners, James T. Ames (1810-1883) of Chicopee, Massachusetts. He also owned Ames Manufacturing Company, a Chicopee company which had government contracts for making swords and cannons during the Civil War. Ames was interested in mineralogy and had a collection of rare and unusual minerals.

The type of deposit is debatable. Old references suggest it is a stratabound deposit, enriched by regional metamorphism. However, in recent years it has become recognized that the deposits are located along a major thrust fault β€” the primary evidence being ultramafic tectonic slivers which occur all along the stratigraphic horizon of the deposits. The deposits themselves may be thrust fault slivers of aluminous rock, or they may be hydrothermal deposits β€” or a combination of both. The old Chester emery mines are divided into two groups:

North of Rte 20 β€” Macia Mine, Sackett Mine, and Snow Mine.
South of Rte 20 β€” Old Mine, Melvin Mine, and Wright Mine.

The most frequented site is the Old Mine, located closest to Rte. 20. This mine, the Melvin, and the Sackett are actually mining complexes involving combinations of open cut and underground workings. The Macia and Snow mines are mostly underground workings, and the Wright mine is largely an open cut. The Old Mine is the most extensive, having been opened first and operated the longest, involving perhaps half a mile of horizontal levels interconnected by stopes and internal shafts. The open pit at this mine is actually a collapsed section of the second level.

Notes on the mineral list:

β€” Persistent reports of "schorl" from these sites are attributed to misidentifications of ferro-hornblende or dravite crystals. Schorl has not been proven to exist here.

β€” Reports of azurite are misidentifications of carbonate-cyanotrichite. Azurite has not been found here.

β€” "Corundophyllite" was discredited as a species.

The following mineral list includes all species reported for the group of mines.

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

39 valid minerals. 1 (TL) - type locality of valid minerals. 2 erroneous literature entries.

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“˜ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Localities: Reported from at least 7 localities in this region.
β“˜ Albite
Formula: Na(AlSi3O8)
β“˜ Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
β“˜ Almandine
Formula: Fe2+3Al2(SiO4)3
β“˜ Amesite (TL)
Formula: Mg2Al(AlSiO5)(OH)4
Localities: Reported from at least 6 localities in this region.
Habit: hexagonal plates, foliated
Colour: green
β“˜ Aragonite
Formula: CaCO3
β“˜ Azurite
Formula: Cu3(CO3)2(OH)2
Description: (misidentification of carbonate-cyanotrichite)
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Localities: Reported from at least 6 localities in this region.
β“˜ Bornite
Formula: Cu5FeS4
β“˜ Brookite
Formula: TiO2
β“˜ Calcite
Formula: CaCO3
Localities: Reported from at least 7 localities in this region.
β“˜ Carbonatecyanotrichite
Formula: Cu4Al2(CO3,SO4)(OH)12 · 2H2O
β“˜ Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 7 localities in this region.
β“˜ Chamosite
Formula: (Fe2+)5Al(Si,Al)4O10(OH,O)8
β“˜ 'Chlorite Group'
β“˜ Chloritoid
Formula: (Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Localities: Reported from at least 7 localities in this region.
β“˜ Chromite
Formula: Fe2+Cr3+2O4
β“˜ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Localities: Reported from at least 7 localities in this region.
β“˜ Clinochlore var. Corundophilite
Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8
β“˜ Clinozoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
β“˜ Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
β“˜ Corundum
Formula: Al2O3
Localities: Reported from at least 7 localities in this region.
β“˜ Cummingtonite
Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2
β“˜ Cuprite ?
Formula: Cu2O
β“˜ Diaoyudaoite
Formula: NaAl11O17
β“˜ Diaspore
Formula: AlO(OH)
Localities: Reported from at least 6 localities in this region.
β“˜ Dravite
Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Localities: Reported from at least 6 localities in this region.
β“˜ Ferro-hornblende
Formula: ◻Ca2(Fe2+4Al)(Si7Al)O22(OH)2
β“˜ Hematite
Formula: Fe2O3
β“˜ Ilmenite
Formula: Fe2+TiO3
β“˜ Kyanite
Formula: Al2(SiO4)O
β“˜ Magnesite
Formula: MgCO3
References:
Kenneth Gliesman
β“˜ Magnesite var. Iron-bearing Magnesite
Formula: (Mg,Fe)CO3
References:
Ken Gliesman
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 7 localities in this region.
β“˜ Malachite
Formula: Cu2(CO3)(OH)2
β“˜ Margarite
Formula: CaAl2(Al2Si2O10)(OH)2
Localities: Reported from at least 7 localities in this region.
β“˜ Molybdenite
Formula: MoS2
Description: In distinct tabular crystals from a vein in hornblende-chlorite schist with epidote.
β“˜ Paragonite
Formula: NaAl2(AlSi3O10)(OH)2
β“˜ Pyrite
Formula: FeS2
Localities: Reported from at least 7 localities in this region.
β“˜ Quartz
Formula: SiO2
Localities: Reported from at least 7 localities in this region.
β“˜ Rutile
Formula: TiO2
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Description: (misidentification of ferrohornblende)
β“˜ Spinel
Formula: MgAl2O4
β“˜ Talc
Formula: Mg3Si4O10(OH)2
Localities: Reported from at least 7 localities in this region.
β“˜ Titanite
Formula: CaTi(SiO4)O

Gallery:

◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2β“˜ Actinolite
Na(AlSi3O8)β“˜ Albite
Mg2Al(AlSiO5)(OH)4β“˜ Amesite (TL)
Mg5Al(AlSi3O10)(OH)8β“˜ Clinochlore
(Mg,Fe,Al)6(Si,Al)4O10(OH)8β“˜ Clinochlore var. Corundophilite
(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)β“˜ Clinozoisite
Al2O3β“˜ Corundum
AlO(OH)β“˜ Diaspore
NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)β“˜ Dravite
(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)β“˜ Epidote
Fe2+TiO3β“˜ Ilmenite
(Mg,Fe)CO3β“˜ Magnesite var. Iron-bearing Magnesite
Fe2+Fe3+2O4β“˜ Magnetite
CaAl2(Al2Si2O10)(OH)2β“˜ Margarite
FeS2β“˜ Pyrite
TiO2β“˜ Rutile
Mg3Si4O10(OH)2β“˜ Talc

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Bornite2.BA.15Cu5FeS4
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Molybdenite2.EA.30MoS2
β“˜Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
β“˜Cuprite ?4.AA.10Cu2O
β“˜Spinel4.BB.05MgAl2O4
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Chromite4.BB.05Fe2+Cr3+2O4
β“˜Ilmenite4.CB.05Fe2+TiO3
β“˜Corundum4.CB.05Al2O3
β“˜Hematite4.CB.05Fe2O3
β“˜Diaoyudaoite4.CC.45NaAl11O17
β“˜Quartz4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
β“˜Brookite4.DD.10TiO2
β“˜Diaspore4.FD.10AlO(OH)
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Magnesite
var. Iron-bearing Magnesite		5.AB.05(Mg,Fe)CO3
β“˜5.AB.05MgCO3
β“˜Aragonite5.AB.15CaCO3
β“˜Azurite ?5.BA.05Cu3(CO3)2(OH)2
β“˜Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Carbonatecyanotrichite7.DE.10Cu4Al2(CO3,SO4)(OH)12 Β· 2H2O
Group 9 - Silicates
β“˜Almandine9.AD.25Fe2+3Al2(SiO4)3
β“˜Kyanite9.AF.15Al2(SiO4)O
β“˜Chloritoid9.AF.85(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
β“˜Titanite9.AG.15CaTi(SiO4)O
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Clinozoisite9.BG.05a(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
β“˜Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
β“˜Dravite9.CK.05NaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Schorl ?9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Cummingtonite9.DE.05β—»{Mg2}{Mg5}(Si8O22)(OH)2
β“˜Ferro-hornblende9.DE.10β—»Ca2(Fe2+4Al)(Si7Al)O22(OH)2
β“˜Actinolite9.DE.10β—»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Paragonite9.EC.15NaAl2(AlSi3O10)(OH)2
β“˜Margarite9.EC.30CaAl2(Al2Si2O10)(OH)2
β“˜Clinochlore
var. Corundophilite		9.EC.55(Mg,Fe,Al)6(Si,Al)4O10(OH)8
β“˜Chamosite9.EC.55(Fe2+)5Al(Si,Al)4O10(OH,O)8
β“˜Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
β“˜Amesite (TL)9.ED.15Mg2Al(AlSiO5)(OH)4
β“˜Albite
var. Oligoclase		9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
β“˜9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Chlorite Group'-
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

List of minerals for each chemical element

HHydrogen
Hβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hβ“˜ AmesiteMg2Al(AlSiO5)(OH)4
Hβ“˜ AzuriteCu3(CO3)2(OH)2
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ CarbonatecyanotrichiteCu4Al2(CO3,SO4)(OH)12 · 2H2O
Hβ“˜ Chamosite(Fe2+)5Al(Si,Al)4O10(OH,O)8
Hβ“˜ Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Hβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Hβ“˜ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hβ“˜ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Hβ“˜ Cummingtonite◻{Mg2}{Mg5}(Si8O22)(OH)2
Hβ“˜ DiasporeAlO(OH)
Hβ“˜ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ Ferro-hornblende◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
Hβ“˜ MalachiteCu2(CO3)(OH)2
Hβ“˜ MargariteCaAl2(Al2Si2O10)(OH)2
Hβ“˜ ParagoniteNaAl2(AlSi3O10)(OH)2
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hβ“˜ TalcMg3Si4O10(OH)2
BBoron
Bβ“˜ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
Cβ“˜ AragoniteCaCO3
Cβ“˜ AzuriteCu3(CO3)2(OH)2
Cβ“˜ Magnesite var. Iron-bearing Magnesite(Mg,Fe)CO3
Cβ“˜ CalciteCaCO3
Cβ“˜ CarbonatecyanotrichiteCu4Al2(CO3,SO4)(OH)12 · 2H2O
Cβ“˜ MagnesiteMgCO3
Cβ“˜ MalachiteCu2(CO3)(OH)2
OOxygen
Oβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ AmesiteMg2Al(AlSiO5)(OH)4
Oβ“˜ AragoniteCaCO3
Oβ“˜ AzuriteCu3(CO3)2(OH)2
Oβ“˜ AlmandineFe32+Al2(SiO4)3
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ Magnesite var. Iron-bearing Magnesite(Mg,Fe)CO3
Oβ“˜ BrookiteTiO2
Oβ“˜ CalciteCaCO3
Oβ“˜ CarbonatecyanotrichiteCu4Al2(CO3,SO4)(OH)12 · 2H2O
Oβ“˜ Chamosite(Fe2+)5Al(Si,Al)4O10(OH,O)8
Oβ“˜ Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Oβ“˜ ChromiteFe2+Cr23+O4
Oβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Oβ“˜ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Oβ“˜ CorundumAl2O3
Oβ“˜ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Oβ“˜ Cummingtonite◻{Mg2}{Mg5}(Si8O22)(OH)2
Oβ“˜ CupriteCu2O
Oβ“˜ DiaoyudaoiteNaAl11O17
Oβ“˜ DiasporeAlO(OH)
Oβ“˜ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ Ferro-hornblende◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
Oβ“˜ HematiteFe2O3
Oβ“˜ IlmeniteFe2+TiO3
Oβ“˜ KyaniteAl2(SiO4)O
Oβ“˜ MagnesiteMgCO3
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MalachiteCu2(CO3)(OH)2
Oβ“˜ MargariteCaAl2(Al2Si2O10)(OH)2
Oβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Oβ“˜ ParagoniteNaAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ RutileTiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ SpinelMgAl2O4
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ TitaniteCaTi(SiO4)O
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ DiaoyudaoiteNaAl11O17
Naβ“˜ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Naβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Naβ“˜ ParagoniteNaAl2(AlSi3O10)(OH)2
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mgβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgβ“˜ AmesiteMg2Al(AlSiO5)(OH)4
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgβ“˜ Magnesite var. Iron-bearing Magnesite(Mg,Fe)CO3
Mgβ“˜ Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Mgβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mgβ“˜ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Mgβ“˜ Cummingtonite◻{Mg2}{Mg5}(Si8O22)(OH)2
Mgβ“˜ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Mgβ“˜ MagnesiteMgCO3
Mgβ“˜ SpinelMgAl2O4
Mgβ“˜ TalcMg3Si4O10(OH)2
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AmesiteMg2Al(AlSiO5)(OH)4
Alβ“˜ AlmandineFe32+Al2(SiO4)3
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ CarbonatecyanotrichiteCu4Al2(CO3,SO4)(OH)12 · 2H2O
Alβ“˜ Chamosite(Fe2+)5Al(Si,Al)4O10(OH,O)8
Alβ“˜ Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Alβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Alβ“˜ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Alβ“˜ CorundumAl2O3
Alβ“˜ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Alβ“˜ DiaoyudaoiteNaAl11O17
Alβ“˜ DiasporeAlO(OH)
Alβ“˜ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ Ferro-hornblende◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
Alβ“˜ KyaniteAl2(SiO4)O
Alβ“˜ MargariteCaAl2(Al2Si2O10)(OH)2
Alβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Alβ“˜ ParagoniteNaAl2(AlSi3O10)(OH)2
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alβ“˜ SpinelMgAl2O4
SiSilicon
Siβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ AmesiteMg2Al(AlSiO5)(OH)4
Siβ“˜ AlmandineFe32+Al2(SiO4)3
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ Chamosite(Fe2+)5Al(Si,Al)4O10(OH,O)8
Siβ“˜ Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Siβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Siβ“˜ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Siβ“˜ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Siβ“˜ Cummingtonite◻{Mg2}{Mg5}(Si8O22)(OH)2
Siβ“˜ DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ Ferro-hornblende◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
Siβ“˜ KyaniteAl2(SiO4)O
Siβ“˜ MargariteCaAl2(Al2Si2O10)(OH)2
Siβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Siβ“˜ ParagoniteNaAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ TalcMg3Si4O10(OH)2
Siβ“˜ TitaniteCaTi(SiO4)O
SSulfur
Sβ“˜ BorniteCu5FeS4
Sβ“˜ CarbonatecyanotrichiteCu4Al2(CO3,SO4)(OH)12 · 2H2O
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ MolybdeniteMoS2
Sβ“˜ PyriteFeS2
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CaCalcium
Caβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caβ“˜ AragoniteCaCO3
Caβ“˜ CalciteCaCO3
Caβ“˜ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ Ferro-hornblende◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
Caβ“˜ MargariteCaAl2(Al2Si2O10)(OH)2
Caβ“˜ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Caβ“˜ TitaniteCaTi(SiO4)O
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiβ“˜ BrookiteTiO2
Tiβ“˜ IlmeniteFe2+TiO3
Tiβ“˜ RutileTiO2
Tiβ“˜ TitaniteCaTi(SiO4)O
CrChromium
Crβ“˜ ChromiteFe2+Cr23+O4
MnManganese
Mnβ“˜ Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
FeIron
Feβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feβ“˜ AlmandineFe32+Al2(SiO4)3
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ BorniteCu5FeS4
Feβ“˜ Magnesite var. Iron-bearing Magnesite(Mg,Fe)CO3
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ Chamosite(Fe2+)5Al(Si,Al)4O10(OH,O)8
Feβ“˜ Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Feβ“˜ ChromiteFe2+Cr23+O4
Feβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Feβ“˜ Clinochlore var. Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ Ferro-hornblende◻Ca2(Fe42+Al)(Si7Al)O22(OH)2
Feβ“˜ HematiteFe2O3
Feβ“˜ IlmeniteFe2+TiO3
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ PyriteFeS2
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CuCopper
Cuβ“˜ AzuriteCu3(CO3)2(OH)2
Cuβ“˜ BorniteCu5FeS4
Cuβ“˜ CarbonatecyanotrichiteCu4Al2(CO3,SO4)(OH)12 · 2H2O
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ CupriteCu2O
Cuβ“˜ MalachiteCu2(CO3)(OH)2
MoMolybdenum
Moβ“˜ MolybdeniteMoS2

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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References

chlorites from California and Wyoming. U.S. National Museum Proceedings: 58: 371-379.
Jackson, C. T. (1864): Discovery of Emery in Chester, Hampden County, Massachusetts, Proceedings of the Boston Society of Natural History: 10: 84.
Shepard, C. U. (1865): A Description of the Emery Mine of Chester, Hampden County, Massachusetts, pamphlet, 16 pp., London, 1865.
Smith, J. L. (1866): On the Emery Mine of Chester, Hampden County, Massachusetts, American Journal of Science: 17: 83-93.
Emerson, Benjamin K. (1895) A mineralogical lexicon of Franklin, Hampshire, and Hampden counties, Massachusetts. Bulletin Vol. 126. US Geological Survey doi:10.3133/b126
Lewis, Joseph V. (1896): "Historical Sketch of Corundum Mining in America" in Corundum and the Basic Magnesian Rocks of Western North Carolina, North Carolina Geological Survey Bulletin 11: 88.
Pratt, J. A. (1906): Corundum and Its Occurrence and Distribution in the United States, USGS Bulletin 269.
Palache, Charles and Wood, H. O. (1909): Crystallographic Notes on Minerals from Chester, Massachusetts, Contributions from the Harvard Mineralogical Museum, No. 14.
Shannon, Earl V. (1919) Famous mineral localities: The Chester emery mine. American Mineralogist, 4 (6) 69-73
Shannon, Earl V. (1920): Analysis and optical properties of amesite and corundophilite from Chester, Massachusetts and of chromium-bearing
Apfel, Earl T. (1945): Emery deposits near Chester, Massachusetts, USGS Open-File Report 45-58.
Perry, Clay (1946): New England's Buried Treasure, New York, Stephen Daye Press.
Lincks, G. Fred (1978): The Chester Emery Mines, Mineralogical Recordz: 9: 235-242.
Francis, C. A. and D. E. Lange (1988): Four Occurrences of Dravite in Western New England, Rocks and Minerals: 63: 455.
Plante, A. (1992): Western Massachusetts Mineral Localities, Valley Geology, Greenfield, Massachusetts.
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