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Chester Emery Mines, Chester, Hampden County, Massachusetts, USAi
| Regional Level Types | |
|---|---|
| Chester Emery Mines | Group of Mines |
| Chester | Town |
| Hampden County | County |
| Massachusetts | State |
| USA | Country |
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Latitude & Longitude (WGS84):
42° 16' 12'' North , 73° 0' 4'' West
Latitude & Longitude (decimal):
Type:
Group of Mines
Kรถppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Chester | 627 (2017) | 2.1km |
| Middlefield | 551 (2017) | 8.8km |
| Becket | 1,786 (2017) | 9.6km |
| Huntington | 936 (2017) | 11.0km |
| Otis | 1,389 (2017) | 11.3km |
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 |
|---|---|---|
| Connecticut Valley Mineral Club | Springfield, Massachusetts | 39km |
| Northern Berkshire Mineral Club | North Adams, Massachusetts | 49km |
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 โ 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 โ or a combination of both. The old Chester emery mines are divided into two groups:
North of Rte 20 โ Macia Mine, Sackett Mine, and Snow Mine.
South of Rte 20 โ 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:
โ 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.
โ Reports of azurite are misidentifications of carbonate-cyanotrichite. Azurite has not been found here.
โ "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 ElementsCommodity 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-localities39 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 DiagramDetailed Mineral List:
| โ Actinolite Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 Localities: Reported from at least 7 localities in this region. |
| โ Albite Formula: Na(AlSi3O8) |
| โ Albite var. Oligoclase Formula: (Na,Ca)[Al(Si,Al)Si2O8] |
| โ Almandine Formula: Fe2+3Al2(SiO4)3 Localities: |
| โ Amesite (TL) Formula: Mg2Al(AlSiO5)(OH)4 Localities: Reported from at least 6 localities in this region. Habit: hexagonal plates, foliated Colour: green |
| โ Aragonite Formula: CaCO3 Localities: |
| โ Formula: Cu3(CO3)2(OH)2 Description: (misidentification of carbonate-cyanotrichite) |
| โ '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. |
| โ Bornite Formula: Cu5FeS4 |
| โ Brookite Formula: TiO2 |
| โ Calcite Formula: CaCO3 Localities: Reported from at least 7 localities in this region. |
| โ Carbonatecyanotrichite Formula: Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
| โ Chalcopyrite Formula: CuFeS2 Localities: Reported from at least 7 localities in this region. |
| โ Chamosite Formula: Fe2+5Al(AlSi3O)10(OH)8 |
| โ 'Chlorite Group' |
| โ Chloritoid Formula: Fe2+Al2O(SiO4)(OH)2 Localities: Reported from at least 7 localities in this region. |
| โ Chromite Formula: Fe2+Cr3+2O4 |
| โ Clinochlore Formula: Mg5Al(AlSi3O10)(OH)8 Localities: Reported from at least 7 localities in this region. |
| โ Clinochlore var. Corundophilite Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8 |
| โ Clinozoisite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| โ Cordierite Formula: Mg2Al4Si5O18 |
| โ Corundum Formula: Al2O3 Localities: Reported from at least 7 localities in this region. |
| โ Cummingtonite Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| โ Cuprite ? Formula: Cu2O Locality: Chester Emery Mines slag locality, Chester Emery Mines, Chester, Hampden County, Massachusetts, USA References: |
| โ Diaoyudaoite Formula: NaAl11O17 |
| โ Diaspore Formula: AlO(OH) Localities: Reported from at least 6 localities in this region. |
| โ Dravite Formula: NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| โ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) Localities: Reported from at least 6 localities in this region. |
| โ Ferro-hornblende Formula: ◻Ca2(Fe2+4Al)(Si7Al)O22(OH)2 Localities: Sackett Mine, Chester Emery Mines, Chester, Hampden County, Massachusetts, USA Macia Mine (Marcia Mine), Chester Emery Mines, Chester, Hampden County, Massachusetts, USA Melvin Mine, Chester Emery Mines, Chester, Hampden County, Massachusetts, USA Old Mine, Chester Emery Mines, Chester, Hampden County, Massachusetts, USA Chester Emery Mines, Chester, Hampden County, Massachusetts, USA |
| โ Hematite Formula: Fe2O3 |
| โ Ilmenite Formula: Fe2+TiO3 |
| โ Kyanite Formula: Al2(SiO4)O |
| โ Magnesite Formula: MgCO3 References: |
| โ Magnesite var. Iron-bearing Magnesite Formula: (Mg,Fe)CO3 References: |
| โ Magnetite Formula: Fe2+Fe3+2O4 Localities: Reported from at least 7 localities in this region. |
| โ Malachite Formula: Cu2(CO3)(OH)2 Localities: |
| โ Margarite Formula: CaAl2(Al2Si2O10)(OH)2 Localities: Reported from at least 7 localities in this region. |
| โ Molybdenite Formula: MoS2 Description: In distinct tabular crystals from a vein in hornblende-chlorite schist with epidote. |
| โ Paragonite Formula: NaAl2(AlSi3O10)(OH)2 |
| โ Pyrite Formula: FeS2 Localities: Reported from at least 7 localities in this region. |
| โ Quartz Formula: SiO2 Localities: Reported from at least 7 localities in this region. |
| โ Rutile Formula: TiO2 Localities: |
| โ Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) Description: (misidentification of ferrohornblende) |
| โ Spinel Formula: MgAl2O4 |
| โ Talc Formula: Mg3Si4O10(OH)2 Localities: Reported from at least 7 localities in this region. |
| โ Titanite Formula: CaTi(SiO4)O Localities: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| โ | Bornite | 2.BA.15 | Cu5FeS4 |
| โ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| โ | Molybdenite | 2.EA.30 | MoS2 |
| โ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| โ | Cuprite ? | 4.AA.10 | Cu2O |
| โ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| โ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| โ | Spinel | 4.BB.05 | MgAl2O4 |
| โ | Corundum | 4.CB.05 | Al2O3 |
| โ | Hematite | 4.CB.05 | Fe2O3 |
| โ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| โ | Diaoyudaoite | 4.CC.45 | NaAl11O17 |
| โ | Quartz | 4.DA.05 | SiO2 |
| โ | Rutile | 4.DB.05 | TiO2 |
| โ | Brookite | 4.DD.10 | TiO2 |
| โ | Diaspore | 4.FD.10 | AlO(OH) |
| Group 5 - Nitrates and Carbonates | |||
| โ | Magnesite var. Iron-bearing Magnesite | 5.AB.05 | (Mg,Fe)CO3 |
| โ | Calcite | 5.AB.05 | CaCO3 |
| โ | Magnesite | 5.AB.05 | MgCO3 |
| โ | Aragonite | 5.AB.15 | CaCO3 |
| โ | Azurite ? | 5.BA.05 | Cu3(CO3)2(OH)2 |
| โ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| โ | Carbonatecyanotrichite | 7.DE.10 | Cu4Al2(CO3,SO4)(OH)12 ยท 2H2O |
| Group 9 - Silicates | |||
| โ | Almandine | 9.AD.25 | Fe2+3Al2(SiO4)3 |
| โ | Kyanite | 9.AF.15 | Al2(SiO4)O |
| โ | Chloritoid | 9.AF.85 | Fe2+Al2O(SiO4)(OH)2 |
| โ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| โ | Clinozoisite | 9.BG.05a | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| โ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| โ | Cordierite | 9.CJ.10 | Mg2Al4Si5O18 |
| โ | Dravite | 9.CK.05 | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| โ | Schorl ? | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| โ | Cummingtonite | 9.DE.05 | โป{Mg2}{Mg5}(Si8O22)(OH)2 |
| โ | Actinolite | 9.DE.10 | โปCa2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| โ | Ferro-hornblende | 9.DE.10 | โปCa2(Fe2+4Al)(Si7Al)O22(OH)2 |
| โ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| โ | Paragonite | 9.EC.15 | NaAl2(AlSi3O10)(OH)2 |
| โ | Margarite | 9.EC.30 | CaAl2(Al2Si2O10)(OH)2 |
| โ | Chamosite | 9.EC.55 | Fe2+5Al(AlSi3O)10(OH)8 |
| โ | Clinochlore | 9.EC.55 | Mg5Al(AlSi3O10)(OH)8 |
| โ | var. Corundophilite | 9.EC.55 | (Mg,Fe,Al)6(Si,Al)4O10(OH)8 |
| โ | Amesite (TL) | 9.ED.15 | Mg2Al(AlSiO5)(OH)4 |
| โ | Albite | 9.FA.35 | Na(AlSi3O8) |
| โ | var. Oligoclase | 9.FA.35 | (Na,Ca)[Al(Si,Al)Si2O8] |
| Unclassified | |||
| โ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| โ | 'Chlorite Group' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | โ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| H | โ Amesite | Mg2Al(AlSiO5)(OH)4 |
| H | โ Azurite | Cu3(CO3)2(OH)2 |
| H | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| H | โ Carbonatecyanotrichite | Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
| H | โ Chamosite | Fe52+Al(AlSi3O)10(OH)8 |
| H | โ Chloritoid | Fe2+Al2O(SiO4)(OH)2 |
| H | โ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| H | โ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| H | โ Clinochlore var. Corundophilite | (Mg,Fe,Al)6(Si,Al)4O10(OH)8 |
| H | โ Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| H | โ Diaspore | AlO(OH) |
| H | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | โ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| H | โ Malachite | Cu2(CO3)(OH)2 |
| H | โ Margarite | CaAl2(Al2Si2O10)(OH)2 |
| H | โ Paragonite | NaAl2(AlSi3O10)(OH)2 |
| H | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | โ Talc | Mg3Si4O10(OH)2 |
| B | Boron | |
| B | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| C | Carbon | |
| C | โ Aragonite | CaCO3 |
| C | โ Azurite | Cu3(CO3)2(OH)2 |
| C | โ Magnesite var. Iron-bearing Magnesite | (Mg,Fe)CO3 |
| C | โ Calcite | CaCO3 |
| C | โ Carbonatecyanotrichite | Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
| C | โ Magnesite | MgCO3 |
| C | โ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | โ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| O | โ Albite | Na(AlSi3O8) |
| O | โ Amesite | Mg2Al(AlSiO5)(OH)4 |
| O | โ Aragonite | CaCO3 |
| O | โ Azurite | Cu3(CO3)2(OH)2 |
| O | โ Almandine | Fe32+Al2(SiO4)3 |
| O | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | โ Magnesite var. Iron-bearing Magnesite | (Mg,Fe)CO3 |
| O | โ Brookite | TiO2 |
| O | โ Calcite | CaCO3 |
| O | โ Carbonatecyanotrichite | Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
| O | โ Chamosite | Fe52+Al(AlSi3O)10(OH)8 |
| O | โ Chloritoid | Fe2+Al2O(SiO4)(OH)2 |
| O | โ Chromite | Fe2+Cr23+O4 |
| O | โ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| O | โ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| O | โ Cordierite | Mg2Al4Si5O18 |
| O | โ Corundum | Al2O3 |
| O | โ Clinochlore var. Corundophilite | (Mg,Fe,Al)6(Si,Al)4O10(OH)8 |
| O | โ Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| O | โ Cuprite | Cu2O |
| O | โ Diaoyudaoite | NaAl11O17 |
| O | โ Diaspore | AlO(OH) |
| O | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | โ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| O | โ Hematite | Fe2O3 |
| O | โ Ilmenite | Fe2+TiO3 |
| O | โ Kyanite | Al2(SiO4)O |
| O | โ Magnesite | MgCO3 |
| O | โ Magnetite | Fe2+Fe23+O4 |
| O | โ Malachite | Cu2(CO3)(OH)2 |
| O | โ Margarite | CaAl2(Al2Si2O10)(OH)2 |
| O | โ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| O | โ Paragonite | NaAl2(AlSi3O10)(OH)2 |
| O | โ Quartz | SiO2 |
| O | โ Rutile | TiO2 |
| O | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | โ Spinel | MgAl2O4 |
| O | โ Talc | Mg3Si4O10(OH)2 |
| O | โ Titanite | CaTi(SiO4)O |
| F | Fluorine | |
| F | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Na | Sodium | |
| Na | โ Albite | Na(AlSi3O8) |
| Na | โ Diaoyudaoite | NaAl11O17 |
| Na | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Na | โ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Na | โ Paragonite | NaAl2(AlSi3O10)(OH)2 |
| Na | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | Magnesium | |
| Mg | โ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Mg | โ Amesite | Mg2Al(AlSiO5)(OH)4 |
| Mg | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Mg | โ Magnesite var. Iron-bearing Magnesite | (Mg,Fe)CO3 |
| Mg | โ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| Mg | โ Cordierite | Mg2Al4Si5O18 |
| Mg | โ Clinochlore var. Corundophilite | (Mg,Fe,Al)6(Si,Al)4O10(OH)8 |
| Mg | โ Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| Mg | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | โ Magnesite | MgCO3 |
| Mg | โ Spinel | MgAl2O4 |
| Mg | โ Talc | Mg3Si4O10(OH)2 |
| Al | Aluminium | |
| Al | โ Albite | Na(AlSi3O8) |
| Al | โ Amesite | Mg2Al(AlSiO5)(OH)4 |
| Al | โ Almandine | Fe32+Al2(SiO4)3 |
| Al | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | โ Carbonatecyanotrichite | Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
| Al | โ Chamosite | Fe52+Al(AlSi3O)10(OH)8 |
| Al | โ Chloritoid | Fe2+Al2O(SiO4)(OH)2 |
| Al | โ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| Al | โ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Al | โ Cordierite | Mg2Al4Si5O18 |
| Al | โ Corundum | Al2O3 |
| Al | โ Clinochlore var. Corundophilite | (Mg,Fe,Al)6(Si,Al)4O10(OH)8 |
| Al | โ Diaoyudaoite | NaAl11O17 |
| Al | โ Diaspore | AlO(OH) |
| Al | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | โ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| Al | โ Kyanite | Al2(SiO4)O |
| Al | โ Margarite | CaAl2(Al2Si2O10)(OH)2 |
| Al | โ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Al | โ Paragonite | NaAl2(AlSi3O10)(OH)2 |
| Al | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | โ Spinel | MgAl2O4 |
| Si | Silicon | |
| Si | โ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Si | โ Albite | Na(AlSi3O8) |
| Si | โ Amesite | Mg2Al(AlSiO5)(OH)4 |
| Si | โ Almandine | Fe32+Al2(SiO4)3 |
| Si | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | โ Chamosite | Fe52+Al(AlSi3O)10(OH)8 |
| Si | โ Chloritoid | Fe2+Al2O(SiO4)(OH)2 |
| Si | โ Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| Si | โ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Si | โ Cordierite | Mg2Al4Si5O18 |
| Si | โ Clinochlore var. Corundophilite | (Mg,Fe,Al)6(Si,Al)4O10(OH)8 |
| Si | โ Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
| Si | โ Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | โ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| Si | โ Kyanite | Al2(SiO4)O |
| Si | โ Margarite | CaAl2(Al2Si2O10)(OH)2 |
| Si | โ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Si | โ Paragonite | NaAl2(AlSi3O10)(OH)2 |
| Si | โ Quartz | SiO2 |
| Si | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | โ Talc | Mg3Si4O10(OH)2 |
| Si | โ Titanite | CaTi(SiO4)O |
| S | Sulfur | |
| S | โ Bornite | Cu5FeS4 |
| S | โ Carbonatecyanotrichite | Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
| S | โ Chalcopyrite | CuFeS2 |
| S | โ Molybdenite | MoS2 |
| S | โ Pyrite | FeS2 |
| K | Potassium | |
| K | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Ca | Calcium | |
| Ca | โ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Ca | โ Aragonite | CaCO3 |
| Ca | โ Calcite | CaCO3 |
| Ca | โ Clinozoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
| Ca | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | โ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| Ca | โ Margarite | CaAl2(Al2Si2O10)(OH)2 |
| Ca | โ Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Ca | โ Titanite | CaTi(SiO4)O |
| Ti | Titanium | |
| Ti | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Ti | โ Brookite | TiO2 |
| Ti | โ Ilmenite | Fe2+TiO3 |
| Ti | โ Rutile | TiO2 |
| Ti | โ Titanite | CaTi(SiO4)O |
| Cr | Chromium | |
| Cr | โ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | โ Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| Fe | โ Almandine | Fe32+Al2(SiO4)3 |
| Fe | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | โ Bornite | Cu5FeS4 |
| Fe | โ Magnesite var. Iron-bearing Magnesite | (Mg,Fe)CO3 |
| Fe | โ Chalcopyrite | CuFeS2 |
| Fe | โ Chamosite | Fe52+Al(AlSi3O)10(OH)8 |
| Fe | โ Chloritoid | Fe2+Al2O(SiO4)(OH)2 |
| Fe | โ Chromite | Fe2+Cr23+O4 |
| Fe | โ Clinochlore var. Corundophilite | (Mg,Fe,Al)6(Si,Al)4O10(OH)8 |
| Fe | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | โ Ferro-hornblende | ◻Ca2(Fe42+Al)(Si7Al)O22(OH)2 |
| Fe | โ Hematite | Fe2O3 |
| Fe | โ Ilmenite | Fe2+TiO3 |
| Fe | โ Magnetite | Fe2+Fe23+O4 |
| Fe | โ Pyrite | FeS2 |
| Fe | โ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Cu | Copper | |
| Cu | โ Azurite | Cu3(CO3)2(OH)2 |
| Cu | โ Bornite | Cu5FeS4 |
| Cu | โ Carbonatecyanotrichite | Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
| Cu | โ Chalcopyrite | CuFeS2 |
| Cu | โ Cuprite | Cu2O |
| Cu | โ Malachite | Cu2(CO3)(OH)2 |
| Mo | Molybdenum | |
| Mo | โ Molybdenite | MoS2 |
Localities in this Region
- Massachusetts
- Hampden County
- Chester
- Hampden County
Other Regions, Features and Areas containing this locality
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References
Emerson, Benjamin K. (1895) A mineralogical lexicon of Franklin, Hampshire, and Hampden counties, Massachusetts. Bulletin 126. US Geological Survey doi:10.3133/b126
Chester Emery Mines, Chester, Hampden County, Massachusetts, USA