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Sherrer Quarry (C.K. Williams & Co. Quarry; Williams Quarry), C.K. Williams Quarry complex (Williams and Company Rock Quarry), Chestnut Hill (College Hill; Lafayette Hill; Mount Lafayette; Paxinosa Ridge), Easton, Northampton Co., Pennsylvania, USAi
Regional Level Types
Sherrer Quarry (C.K. Williams & Co. Quarry; Williams Quarry)Quarry
C.K. Williams Quarry complex (Williams and Company Rock Quarry)Complex
Chestnut Hill (College Hill; Lafayette Hill; Mount Lafayette; Paxinosa Ridge)Hill
Easton- not defined -
Northampton Co.County
PennsylvaniaState
USACountry

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Key
Latitude & Longitude (WGS84):
40° 43' 8'' North , 75° 11' 31'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Phillipsburg14,515 (2017)2.8km
Easton26,915 (2017)4.2km
Lopatcong Overlook734 (2017)4.6km
Harmony441 (2017)5.5km
Upper Pohatcong1,781 (2017)5.5km


Quarry in serpentine/tremolite, located on Chestnut Hill, above the Delaware River, North of Easton. Owned by the C.K. Williams & Co., Easton, PA. Encompassing the original sites of the Sherrer, Verdolite, and minor workings of the Fox quarries, this site was greatly expanded in the mid-1920s, exploiting serpentine for ornamental/building stone and tremolite as mineral pulp additives in paint and paper products. By the mid-1930s, demand for building stone diminished, but the market for its mineral-pulp carried the company until its close of operation in the mid-1940s.

Lower level quarry in serpentine/tremolite. Mineralization in the region was described as early as 1809, primitive quarrying speculated to have occurred as early as 1820. The first fully operational quarry was begun sometime in the 1830s, by Abraham Sherrer. Workings featured a working face 100 feet by 400 feet long. Upon Mr. Sherrer's death in 1898, an additional quarry was opened above by William B. Reed, named the Verdolite Quarry. Both quarries eventually became part of C.K. Williams Quarry complex. These two original quarries are the original/primary sites of origin for most early mineralogical studies and specimens from the area.

In the 1950s the property was put up for sale and purchased by famed Mineralogist Arthur Montgomery, at that time an acting professor at Lafayette College in Easton. He deeded the property to Lafayette in 1953, for the purpose of preserving this unique mineralogical site in perpetuity.

Note that most, if not all, 'eastonite' from this locality is, in fact, a mixture of phlogopite and serpentine. There are no modern analyses confirming the presence of eastonite in Easton; Livi and Veblen (1987) showed that “Eastonite” from Easton, Pennsylvania, is a mixture of phlogopite and a "new form of serpentine".

*Site noted separately to aid the locality search for older labeled specimens.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


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

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Rocks & Minerals: 17: 344.
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Rocks & Min.: 17:344.
'Amphibole Supergroup var: Uralite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Rocks & Min.: 17:344.
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: Rocks & Min.: 17:344.
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Rocks & Min.: 17:344.
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: Rocks & Min.: 11:90.; Rocks & Min.: 17:344.
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: Rocks & Min.: 17:344.
Baryte
Formula: BaSO4
Reference: Rocks & Min.: 17:344.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: Rocks & Min.: 17:344.
Boltwoodite
Formula: (K,Na)(UO2)(SiO3OH) · 1.5H2O
Reference: American Mineralogist: 46: 12-25.; Am.Min.: 45: 39-52
Brucite ?
Formula: Mg(OH)2
Reference: Rocks & Min.: 17:344.
Calcite
Formula: CaCO3
Reference: Rocks & Min.: 17:344.
Carnotite ?
Formula: K2(UO2)2(VO4)2 · 3H2O
Description: carnotite may have been misidentified, presence at locality in question.
Reference: Min. Col. in PA. 1976; Am.Min.: 45: 39-52
Celestine
Formula: SrSO4
Reference: Rocks & Min.: 17:344.
Chalcocite
Formula: Cu2S
Reference: Rocks & Min.: 17:344.
Chalcopyrite
Formula: CuFeS2
Reference: Rocks & Min.: 17:344.
'Chlorite Group'
Reference: Rocks & Min.: 17:344.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: Rocks & Min.: 17:344.
Cuprite
Formula: Cu2O
Reference: Rocks & Min.: 17:344.
Diopside
Formula: CaMgSi2O6
Reference: Rocks & Min.: 17:344.
Dolomite
Formula: CaMg(CO3)2
Reference: Rocks & Min.: 17:344.
Eastonite (TL)
Formula: KMg2Al(Al2Si2O10)(OH)2
Type Locality:
Habit: Rough crystals, cleavage masses. Laminae flexible but inelastic
Colour: Silvery white to bright yellowish green, vitreous with pearly luster
Fluorescence: none
Description: Described first as "Chloritic Vermiculite" by Clarke and Schneider in 1891. Likely the same material as described by professor Frederick Burritt Peck in 1905 as an "alteration of phlogopite to serpentine", noting specimens from both Chestnut Hill and from the continuation of the serpentine belt at Warne's quarry (Royal Green Quarry), across the Delaware river in Phillipsburg, New Jersey. Analysis by Merril and by Eyerman in 1911.
Reference: The Mineralogy of Pennsylvania; Samual G. Gordon 1922; Pg 119 The Talc Deposits of Phillipburg, N.J. and Easton; Peck, F. B., Trenton 1905 8vo., 26pp Livi, K.J.T. and Veblen, D.R. (1987) “Eastonite” from Easton, Pennsylvania: A mixture of phlogopite and a new form of serpentine. American Mineralogist, 72, 113-125.
'Ferro-Actinolite-Tremolite Series'
Reference: Rocks & Min.: 17:344.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Rocks & Min.: 17:344.
Fluorite
Formula: CaF2
Reference: Rocks & Min.: 17:344.
Galena
Formula: PbS
Reference: Rocks & Min.: 17:344.
Graphite
Formula: C
Reference: Rocks & Min.: 17:344.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Rocks & Min.: 17:344.
Hematite
Formula: Fe2O3
Reference: Rocks & Min.: 17:344.
Hydromagnesite
Formula: Mg5(CO3)4(OH)2 · 4H2O
Reference: Rocks & Min.: 17:344.
Ilmenite
Formula: Fe2+TiO3
Reference: Rocks & Min.: 17:344.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Rocks & Min.: 17:344.
Magnesite
Formula: MgCO3
Reference: Rocks & Min.: 17:344.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Rocks & Min.: 17:344.
'Manganese Oxides'
Reference: www.delminsociety.net/easton.htm
'Manganese Oxides var: Manganese Dendrites'
Reference: www.delminsociety.net/easton.htm
Marcasite
Formula: FeS2
Reference: Rocks & Min.: 17:344.
Metanováčekite
Formula: Mg(UO2)2(AsO4)2 · 8H2O
Reference: Smith, II, R. C. (1977) Metanovacekite Chapter in The Mineralogy of
Molybdenite
Formula: MoS2
Reference: Rocks & Min.: 11:90.; Rocks & Min.: 17:344.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Rocks & Min.: 17:344.
Paragonite
Formula: NaAl2(AlSi3O10)(OH)2
Reference: Rocks & Min.: 17:344.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Rocks & Min.: 17:344.
Pyrite
Formula: FeS2
Reference: Rocks & Min.: 17:344.
Pyrolusite
Formula: Mn4+O2
Reference: Rocks & Min.: 17:344.
Quartz
Formula: SiO2
Reference: Rocks & Min.: 17:344.
'Scapolite'
Colour: Lilac
Reference: Rocks & Min.: 11:90.; Rocks & Min.: 17:344.
'Scapolite var: Wernerite'
Colour: Lilac
Reference: Rocks & Min.: 11:90.; Rocks & Min.: 17:344.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Reference: Rocks & Min.: 17:344.
Sphalerite
Formula: ZnS
Reference: Rocks & Min.: 17:344.
Talc
Formula: Mg3Si4O10(OH)2
Reference: Rocks & Min.: 17:344.; Rocks & Min.: 11:90.
Thorianite
Formula: ThO2
Description: Assumed to be in Scherrer Quarry, Montgomery ref. does not distinguish which part of the CK Williams Quarry samples were retrieved from. Montgomery reports that thorianite is very rare, most "thorianite" is in fact thorian-uraninite.
Reference: Rocks & Min.: 11:90. Arthur Montgomery (1957) Three occurrences of high-thorian uraninite near Easton, Pennsylvania. Am. Min. 42: 804-820
Thorite
Formula: Th(SiO4)
Reference: Montgomery "Mineralogy of Pennsylvania 1922-1965" p. 40 (1965)
'Thorogummite'
Formula: (Th,U)(SiO4)1-x(OH)4x
Description: Assumed to be in Scherrer Quarry, Montgomery ref. does not distinguish which part of the CK Williams Quarry samples were retrieved from.
Reference: Rocks & Min.: 11:90.; Arthur Montgomery (1957) Three occurrences of high-thorian uraninite near Easton, Pennsylvania. Am. Min. 42: 804-820; Rocks & Min.: 17:344.; Am.Min.: 45: 39-52
Titanite
Formula: CaTi(SiO4)O
Reference: Rocks & Min.: 17:344.; R. C. Smith, II Ph.D P.G.
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Rocks & Min.: 17:344.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Rocks & Min.: 17:344.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Rocks & Min.: 11:90.; Rocks & Min.: 17:344.
Uraninite
Formula: UO2
Description: Assumed to be in Scherrer Quarry, Montgomery ref. does not distinguish which part of the CK Williams Quarry samples were retrieved from.
Reference: Am.Min.: 45: 39-52; Arthur Montgomery (1957) Three occurrences of high-thorian uraninite near Easton, Pennsylvania. Am. Min. 42: 804-820
Uraninite var: Thorian Uraninite
Formula: (U,Th)O2
Description: Assumed to be in Scherrer Quarry, Montgomery ref. does not distinguish which part of the CK Williams Quarry samples were retrieved from.
Reference: Am.Min.: 45: 39-52; Arthur Montgomery (1957) Three occurrences of high-thorian uraninite near Easton, Pennsylvania. Am. Min. 42: 804-820
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Rocks & Min.: 11:90.; Rocks & Min.: 17:344.; Am.Min.: 45: 39-52
Vesuvianite
Formula: Ca19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Reference: Rocks & Min.: 17:344.
Weeksite
Formula: K2(UO2)2(Si5O13) · 4H2O
Reference: AmMin.45:39; Am Min. 66:610; Am.Min.: 45: 39-52
Wölsendorfite
Formula: Pb7(UO2)14O19(OH)4 · 12H2O
Description: Assumed to be in Scherrer Quarry, Montgomery ref. does not distinguish which part of the CK Williams Quarry samples were retrieved from.
Reference: http://rruff.geo.arizona.edu/doclib/hom/wolsendorfite.pdf; Arthur Montgomery (1957) Three occurrences of high-thorian uraninite near Easton, Pennsylvania. Am. Min. 42: 804-820
Wulfenite
Formula: Pb(MoO4)
Reference: Rocks & Min.: 17:344.
Zaratite
Formula: Ni3(CO3)(OH)4 · 4H2O ?
Reference: Rocks & Min.: 17:344.
Zircon
Formula: Zr(SiO4)
Description: crystals to nearly 5 cm long,1.2 cm wide. Sharply formed, doubly-terminated crystals of outstanding quality have been found in serpentine marix at the site. additional fine specimens have also been reported, embedded in grayish white talc and tremolite rock, at the south end of the quarry.
Reference: Rocks & Min.: 11:90.; Ref1) The Mineralogy of Pennsylvania, 1922-1965; A. Montgomery, Pg. 84 Ref2) Rocks & Min.: 17:344.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Marcasite2.EB.10aFeS2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Brucite ?4.FE.05Mg(OH)2
Carnotite ?4.HB.05K2(UO2)2(VO4)2 · 3H2O
Cuprite4.AA.10Cu2O
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
Thorianite4.DL.05ThO2
Uraninite4.DL.05UO2
var: Thorian Uraninite4.DL.05(U,Th)O2
Wölsendorfite4.GB.30Pb7(UO2)14O19(OH)4 · 12H2O
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Hydromagnesite5.DA.05Mg5(CO3)4(OH)2 · 4H2O
Magnesite5.AB.05MgCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Zaratite ?5.DA.15Ni3(CO3)(OH)4 · 4H2O ?
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Celestine7.AD.35SrSO4
Gypsum7.CD.40CaSO4 · 2H2O
Wulfenite ?7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Fluorapatite8.BN.05Ca5(PO4)3F
Metanováčekite8.EB.10Mg(UO2)2(AsO4)2 · 8H2O
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Boltwoodite9.AK.15(K,Na)(UO2)(SiO3OH) · 1.5H2O
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Diopside9.DA.15CaMgSi2O6
Eastonite (TL)9.EC.20KMg2Al(Al2Si2O10)(OH)2
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Paragonite9.EC.15NaAl2(AlSi3O10)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Thorite9.AD.30Th(SiO4)
Titanite9.AG.15CaTi(SiO4)O
Topaz9.AF.35Al2(SiO4)(F,OH)2
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Vesuvianite9.BG.35Ca19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Weeksite9.AK.30K2(UO2)2(Si5O13) · 4H2O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Uralite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
'Ferro-Actinolite-Tremolite Series'-
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Scapolite'-
'var: Wernerite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
'Thorogummite'-(Th,U)(SiO4)1-x(OH)4x
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Thorianite5.1.1.2ThO2
Uraninite5.1.1.1UO2
AX2O7·xH2O
Wölsendorfite5.4.3.2Pb7(UO2)14O19(OH)4 · 12H2O
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
X(OH)2
Brucite ?6.2.1.1Mg(OH)2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Magnesite14.1.1.2MgCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 16b - HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
Zaratite ?16b.4.1.1Ni3(CO3)(OH)4 · 4H2O ?
Hydromagnesite16b.7.1.1Mg5(CO3)4(OH)2 · 4H2O
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Celestine28.3.1.2SrSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Carnotite ?40.2a.28.1K2(UO2)2(VO4)2 · 3H2O
Metanováčekite40.2a.10.2Mg(UO2)2(AsO4)2 · 8H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Wulfenite ?48.1.3.1Pb(MoO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Thorite51.5.2.3Th(SiO4)
'Thorogummite'51.5.2.5(Th,U)(SiO4)1-x(OH)4x
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Boltwoodite53.3.1.5(K,Na)(UO2)(SiO3OH) · 1.5H2O
Uranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
Weeksite53.3.2.1K2(UO2)2(Si5O13) · 4H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Vesuvianite58.2.4.1Ca19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Diopside65.1.3a.1CaMgSi2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Paragonite71.2.2a.2NaAl2(AlSi3O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Uralite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
Eastonite (TL)-KMg2Al(Al2Si2O10)(OH)2
'Ferro-Actinolite-Tremolite Series'-
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Scapolite'-
'var: Wernerite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
Uraninite
var: Thorian Uraninite
-(U,Th)O2

List of minerals for each chemical element

HHydrogen
H EastoniteKMg2Al(Al2Si2O10)(OH)2
H TalcMg3Si4O10(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H Thorogummite(Th,U)(SiO4)1-x(OH)4x
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H WeeksiteK2(UO2)2(Si5O13) · 4H2O
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H ParagoniteNaAl2(AlSi3O10)(OH)2
H AzuriteCu3(CO3)2(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H GypsumCaSO4 · 2H2O
H HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
H Limonite(Fe,O,OH,H2O)
H MalachiteCu2(CO3)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
H TopazAl2(SiO4)(F,OH)2
H VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
H Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
H Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H WölsendorfitePb7(UO2)14O19(OH)4 · 12H2O
H Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
H MetanováčekiteMg(UO2)2(AsO4)2 · 8H2O
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H BruciteMg(OH)2
H CarnotiteK2(UO2)2(VO4)2 · 3H2O
H ZaratiteNi3(CO3)(OH)4 · 4H2O ?
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
CCarbon
C AzuriteCu3(CO3)2(OH)2
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C GraphiteC
C HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
C MagnesiteMgCO3
C MalachiteCu2(CO3)(OH)2
C ZaratiteNi3(CO3)(OH)4 · 4H2O ?
OOxygen
O EastoniteKMg2Al(Al2Si2O10)(OH)2
O TalcMg3Si4O10(OH)2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O ZirconZr(SiO4)
O ThorianiteThO2
O Thorogummite(Th,U)(SiO4)1-x(OH)4x
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O WeeksiteK2(UO2)2(Si5O13) · 4H2O
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O ParagoniteNaAl2(AlSi3O10)(OH)2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O AzuriteCu3(CO3)2(OH)2
O BaryteBaSO4
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O CalciteCaCO3
O CelestineSrSO4
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O CupriteCu2O
O DiopsideCaMgSi2O6
O DolomiteCaMg(CO3)2
O FluorapatiteCa5(PO4)3F
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
O IlmeniteFe2+TiO3
O Limonite(Fe,O,OH,H2O)
O MagnesiteMgCO3
O MalachiteCu2(CO3)(OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O PhlogopiteKMg3(AlSi3O10)(OH)2
O PyrolusiteMn4+O2
O QuartzSiO2
O TitaniteCaTi(SiO4)O
O TopazAl2(SiO4)(F,OH)2
O VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
O Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O WölsendorfitePb7(UO2)14O19(OH)4 · 12H2O
O Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
O Uraninite (var: Thorian Uraninite)(U,Th)O2
O ThoriteTh(SiO4)
O MetanováčekiteMg(UO2)2(AsO4)2 · 8H2O
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O UraniniteUO2
O BruciteMg(OH)2
O CarnotiteK2(UO2)2(VO4)2 · 3H2O
O WulfenitePb(MoO4)
O ZaratiteNi3(CO3)(OH)4 · 4H2O ?
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
F TopazAl2(SiO4)(F,OH)2
F Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
NaSodium
Na ParagoniteNaAl2(AlSi3O10)(OH)2
Na Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
MgMagnesium
Mg EastoniteKMg2Al(Al2Si2O10)(OH)2
Mg TalcMg3Si4O10(OH)2
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg DiopsideCaMgSi2O6
Mg DolomiteCaMg(CO3)2
Mg HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
Mg MagnesiteMgCO3
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Mg Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Mg MetanováčekiteMg(UO2)2(AsO4)2 · 8H2O
Mg BruciteMg(OH)2
AlAluminium
Al EastoniteKMg2Al(Al2Si2O10)(OH)2
Al ParagoniteNaAl2(AlSi3O10)(OH)2
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al TopazAl2(SiO4)(F,OH)2
Al VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Al Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Al Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Si EastoniteKMg2Al(Al2Si2O10)(OH)2
Si TalcMg3Si4O10(OH)2
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si ZirconZr(SiO4)
Si Thorogummite(Th,U)(SiO4)1-x(OH)4x
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si WeeksiteK2(UO2)2(Si5O13) · 4H2O
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si ParagoniteNaAl2(AlSi3O10)(OH)2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si DiopsideCaMgSi2O6
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si QuartzSiO2
Si TitaniteCaTi(SiO4)O
Si TopazAl2(SiO4)(F,OH)2
Si VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Si Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
Si ThoriteTh(SiO4)
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P FluorapatiteCa5(PO4)3F
SSulfur
S MolybdeniteMoS2
S BaryteBaSO4
S CelestineSrSO4
S ChalcociteCu2S
S ChalcopyriteCuFeS2
S GalenaPbS
S GypsumCaSO4 · 2H2O
S MarcasiteFeS2
S PyriteFeS2
S SphaleriteZnS
ClChlorine
Cl Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K EastoniteKMg2Al(Al2Si2O10)(OH)2
K WeeksiteK2(UO2)2(Si5O13) · 4H2O
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K PhlogopiteKMg3(AlSi3O10)(OH)2
K Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
K CarnotiteK2(UO2)2(VO4)2 · 3H2O
CaCalcium
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca CalciteCaCO3
Ca DiopsideCaMgSi2O6
Ca DolomiteCaMg(CO3)2
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
Ca GypsumCaSO4 · 2H2O
Ca TitaniteCaTi(SiO4)O
Ca VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
TiTitanium
Ti IlmeniteFe2+TiO3
Ti TitaniteCaTi(SiO4)O
Ti Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
VVanadium
V CarnotiteK2(UO2)2(VO4)2 · 3H2O
MnManganese
Mn PyrolusiteMn4+O2
Mn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe ChalcopyriteCuFeS2
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe Limonite(Fe,O,OH,H2O)
Fe MarcasiteFeS2
Fe PyriteFeS2
Fe VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
Fe Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Ni ZaratiteNi3(CO3)(OH)4 · 4H2O ?
CuCopper
Cu AzuriteCu3(CO3)2(OH)2
Cu ChalcociteCu2S
Cu ChalcopyriteCuFeS2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu CupriteCu2O
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS
Zn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
AsArsenic
As MetanováčekiteMg(UO2)2(AsO4)2 · 8H2O
SrStrontium
Sr CelestineSrSO4
ZrZirconium
Zr ZirconZr(SiO4)
MoMolybdenum
Mo MolybdeniteMoS2
Mo WulfenitePb(MoO4)
BaBarium
Ba BaryteBaSO4
PbLead
Pb GalenaPbS
Pb WölsendorfitePb7(UO2)14O19(OH)4 · 12H2O
Pb WulfenitePb(MoO4)
ThThorium
Th ThorianiteThO2
Th Thorogummite(Th,U)(SiO4)1-x(OH)4x
Th Uraninite (var: Thorian Uraninite)(U,Th)O2
Th ThoriteTh(SiO4)
UUranium
U Thorogummite(Th,U)(SiO4)1-x(OH)4x
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U WeeksiteK2(UO2)2(Si5O13) · 4H2O
U WölsendorfitePb7(UO2)14O19(OH)4 · 12H2O
U Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2O
U Uraninite (var: Thorian Uraninite)(U,Th)O2
U MetanováčekiteMg(UO2)2(AsO4)2 · 8H2O
U UraniniteUO2
U CarnotiteK2(UO2)2(VO4)2 · 3H2O

Geochronology

Mineralization age: Proterozoic : 1292.4 ± 12.6 Ma to 985 ± 7 Ma

Important note: This table is based only on rock and mineral ages recorded below and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Precambrian
 Proterozoic
  Neoproterozoic
   Tonian
ⓘ Zircon (youngest age)985 ± 7 Ma
    
   
  Mesoproterozoic
   Ectasian
ⓘ Zircon (oldest age)1292.4 ± 12.6 Ma

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Rocks & Minerals (1936) 11: 90.
Rocks & Minerals (1942) 17: 344.
Montgomery, Arthur (1957) Three occurrences of high-thorian uraninite near Easton, Pennsylvania. American Mineralogist, 42, 804-820.
Montgomery, Arthur (1969) The Mineralogy of Pennsylvania 1922-1966. Academy of Natural Sciences, Philadelphia, Special Publication No. 9.
Smith, R.C. II (1977) Metanovacekite chapter in The Mineralogy of Pennsylvania, 1966-1975. Friends of Mineralogy Pennsylvania Chapter Special Publication No. 1: 174-178.
Livi, K.J.T. and Veblen, D.R. (1987) “Eastonite” from Easton, Pennsylvania: A mixture of phlogopite and a new form of serpentine. American Mineralogist, 72, 113-125.
MATRIX, summer 200_: 95-102.

Mindat Articles

A New Find of Albite from the C.K. Williams & Co. Quarry in Easton, Pennsylvania by Gary Moldovany


Other Regions, Features and Areas containg this locality

North America PlateTectonic Plate

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