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Grace Mine, Morgantown, Berks County, Pennsylvania, USAi
Regional Level Types
Grace MineMine
Morgantown- not defined -
Berks CountyCounty
PennsylvaniaState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
40° 10' 16'' North , 75° 52' 48'' West
Latitude & Longitude (decimal):
40.17111,-75.88000
GeoHash:
G#: dr4h92cve
GRN:
N27W42
Type:
Mine
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Morgantown826 (2017)2.0km
Elverson1,314 (2017)4.3km
Churchtown470 (2017)8.3km
Honey Brook1,758 (2017)8.9km
Alleghenyville1,134 (2017)11.6km
Mindat Locality ID:
9018
Long-form identifier:
mindat:1:2:9018:9
GUID (UUID V4):
893908ce-243d-46cf-8824-1c4b960db85b


Bethlehem Steel's Grace Mine exploited magnetite ore with an iron content of approximately 40 percent. The magnetite mineralization replaced a large wedge of impure Cambrian limestone already altered to calcium and magnesian silicates by contact metamorphism from a thick, subjacent intrusive sheet of diabase (Sims, 1968, p. 122–123). The deposit was the first instance of an ore discovery resulting from an airborne magnetometer survey. The Grace mine anomaly was identified in 1948, core drilling began in September of 1949 and on December 19, 1949, iron ore was hit at a depth of 1,524 feet. Work started in 1951 with the sinking of "A" shaft to a depth of 2,208 feet, used for hoisting ore and transporting materials. "A" shaft was eventually sunk to depth of "B" shaft, at 3,079 feet, which was used for men and materials.

The Grace Mine closed operations in 1977 due in part to depressed iron/steel prices and the high cost of underground ore extraction. The dumps were later used in road/ramp highway construction. Final reclamation of the property by Morgantowwn Properties began sometime after 2004, for an extensive housing development project.

The project "Bryn Eyre" is a housing project in which an entire town, 12,393 residential homes, commercial, school and public areas will be built on site. Projected to be constructed over a 20-25 year period, it is the largest such project in Pennsylvania since the 1950's. (Ref. R. Robinson, Lanc. New Era, 2007)

Ground breaking began April 1, 2007 (observations: Ms Sophia Shultz).

As of November of 2011, the site has been fenced and tailings crushed and hauled away. Police monitor the property. A sad end to yet another good collecting spot. (David S. Bernstein).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


26 valid minerals.

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Antigorite
Formula: Mg3(Si2O5)(OH)4
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ 'Apophyllite Group'
Formula: AB4[Si8O22]X · 8H2O
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Habit: often in distorted foliae, up to several centimeters across
Colour: greenish grey to green with pearly luster
Description: Clinochlore at Grace Mine occurs often in distorted foliae, up to several centimeters across. Although bent and severly distorted at times, it exhibits perfect cleavage.
ⓘ Clinochlore var. Pennine
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Datolite
Formula: CaB(SiO4)(OH)
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ Galena
Formula: PbS
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ Gypsum var. Selenite
Formula: CaSO4 · 2H2O
ⓘ Hematite
Formula: Fe2O3
ⓘ Laumontite
Formula: CaAl2Si4O12 · 4H2O
ⓘ Laumontite var. Leonhardite
Formula: CaAl2Si4O12 · 3H2O
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Marialite
Formula: Na4Al3Si9O24Cl
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Natrolite
Formula: Na2Al2Si3O10 · 2H2O
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
ⓘ Prehnite
Formula: Ca2Al2Si3O10(OH)2
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Sphalerite
Formula: ZnS
ⓘ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
ⓘ Talc
Formula: Mg3Si4O10(OH)2
ⓘ Titanite
Formula: CaTi(SiO4)O
✪ Tochilinite
Formula: Fe2+5-6(Mg,Fe2+)5S6(OH)10
Habit: aggregate in Gypsum associated with enhydro inclusions, on calcite and laminate coatings on calcite
Colour: Black greasy Graphite-like, also coatings giving calcite a Bronzy appearance
Fluorescence: none
Description: The first US locality for Tochilinite, collected in the summer of 1975 by Byron Brookmeyer. Some of the most complete data published on the properties of Tochilinite were compiled using specimens collected by Mr. Brookmeyer at Grace mine.
ⓘ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2

Gallery:

CaCO3ⓘ Calcite
Mg5Al(AlSi3O10)(OH)8ⓘ Clinochlore
Fe2+Fe3+2O4ⓘ Magnetite
FeS2ⓘ Pyrite
Mg3Si4O10(OH)2ⓘ Talc
◻Ca2Mg5(Si8O22)(OH)2ⓘ Tremolite

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘTochilinite2.FD.35Fe2+5-6(Mg,Fe2+)5S6(OH)10
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘDolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGypsum7.CD.40CaSO4 · 2H2O
ⓘvar. Selenite7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘDatolite9.AJ.20CaB(SiO4)(OH)
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘTremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘPrehnite9.DP.20Ca2Al2Si3O10(OH)2
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘvar. Pennine9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘAntigorite9.ED.15Mg3(Si2O5)(OH)4
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘMarialite9.FB.15Na4Al3Si9O24Cl
ⓘNatrolite9.GA.05Na2Al2Si3O10 · 2H2O
ⓘLaumontite9.GB.10CaAl2Si4O12 · 4H2O
ⓘvar. Leonhardite9.GB.10CaAl2Si4O12 · 3H2O
Unclassified
ⓘ'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
ⓘ'Chlorite Group'-
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Apophyllite Group'-AB4[Si8O22]X · 8H2O
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ AntigoriteMg3(Si2O5)(OH)4
Hⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ DatoliteCaB(SiO4)(OH)
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ LaumontiteCaAl2Si4O12 · 4H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ NatroliteNa2Al2Si3O10 · 2H2O
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ PrehniteCa2Al2Si3O10(OH)2
Hⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Hⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hⓘ Gypsum var. SeleniteCaSO4 · 2H2O
Hⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Hⓘ Laumontite var. LeonharditeCaAl2Si4O12 · 3H2O
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
BBoron
Bⓘ DatoliteCaB(SiO4)(OH)
CCarbon
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AntigoriteMg3(Si2O5)(OH)4
Oⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CalciteCaCO3
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ DolomiteCaMg(CO3)2
Oⓘ DatoliteCaB(SiO4)(OH)
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ HematiteFe2O3
Oⓘ LaumontiteCaAl2Si4O12 · 4H2O
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MarialiteNa4Al3Si9O24Cl
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ NatroliteNa2Al2Si3O10 · 2H2O
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ PrehniteCa2Al2Si3O10(OH)2
Oⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Oⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oⓘ Gypsum var. SeleniteCaSO4 · 2H2O
Oⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Oⓘ Garnet GroupX3Z2(SiO4)3
Oⓘ Laumontite var. LeonharditeCaAl2Si4O12 · 3H2O
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ MarialiteNa4Al3Si9O24Cl
Naⓘ NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ AntigoriteMg3(Si2O5)(OH)4
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ TalcMg3Si4O10(OH)2
Mgⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Mgⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mgⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ LaumontiteCaAl2Si4O12 · 4H2O
Alⓘ MarialiteNa4Al3Si9O24Cl
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ NatroliteNa2Al2Si3O10 · 2H2O
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ PrehniteCa2Al2Si3O10(OH)2
Alⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Alⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Alⓘ Laumontite var. LeonharditeCaAl2Si4O12 · 3H2O
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ AntigoriteMg3(Si2O5)(OH)4
Siⓘ Apophyllite GroupAB4[Si8O22]X · 8H2O
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ DatoliteCaB(SiO4)(OH)
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ LaumontiteCaAl2Si4O12 · 4H2O
Siⓘ MarialiteNa4Al3Si9O24Cl
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ NatroliteNa2Al2Si3O10 · 2H2O
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ PrehniteCa2Al2Si3O10(OH)2
Siⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siⓘ Clinochlore var. PennineMg5Al(AlSi3O10)(OH)8
Siⓘ Garnet GroupX3Z2(SiO4)3
Siⓘ Laumontite var. LeonharditeCaAl2Si4O12 · 3H2O
PPhosphorus
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ PyriteFeS2
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Sⓘ Gypsum var. SeleniteCaSO4 · 2H2O
ClChlorine
Clⓘ MarialiteNa4Al3Si9O24Cl
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
Caⓘ DatoliteCaB(SiO4)(OH)
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ GypsumCaSO4 · 2H2O
Caⓘ LaumontiteCaAl2Si4O12 · 4H2O
Caⓘ PrehniteCa2Al2Si3O10(OH)2
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caⓘ Gypsum var. SeleniteCaSO4 · 2H2O
Caⓘ Laumontite var. LeonharditeCaAl2Si4O12 · 3H2O
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ TitaniteCaTi(SiO4)O
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ ChalcopyriteCuFeS2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ HematiteFe2O3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
Feⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
CuCopper
Cuⓘ ChalcopyriteCuFeS2
ZnZinc
Znⓘ SphaleriteZnS
PbLead
Pbⓘ GalenaPbS

Other Regions, Features and Areas containing this locality

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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.

References

Sims, Samuel J. (1968), "The Grace Mine Magnetite Deposit, Berks Co., Pennsylvania" in Ridge, John D. ed., Ore Deposits of the US 1933-1967: Volume I: 115.
Reed, Juliet C. (1976), Annotated Bibliography of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of Pennsylvania, Inc.: 54.
Economic Geology (1985): 80: 418-443.
Anthony, Bideaux, Bladh, Nichols (1990), "Handbook of Mineralogy," Volume 1.
Wharton, Heyward M. (2003) The 1949 discovery of the Grace mine iron deposit, Pennsylvania Geology: 33(1): 2.
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