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Rockport Granite Company quarries, Rockport, Essex County, Massachusetts, USAi
Regional Level Types
Rockport Granite Company quarriesGroup of Quarries
RockportTown
Essex CountyCounty
MassachusettsState
USACountry

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Latitude & Longitude (WGS84):
42° North , 70° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
GRN:
N29W38
Type:
Group of Quarries
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Mindat Locality ID:
32073
Long-form identifier:
mindat:1:2:32073:0
GUID (UUID V4):
64463c1d-7893-4522-9f94-560210315659


The Rockport Granite Company owned a number of quarries and was in business from 1865 to 1933. At its peak of operation, the company employed more than 800 men.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

16 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

β“˜ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Description: Reported from pegmatite in alkalic granite. Likely a sodic amphibole or aegirine.
β“˜ 'Allanite Group'
Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
β“˜ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
β“˜ Astrophyllite
Formula: K2NaFe2+7Ti2Si8O26(OH)4F
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Calcite
Formula: CaCO3
β“˜ Danalite
Formula: Be3Fe2+4(SiO4)3S
β“˜ Fayalite
Formula: Fe2+2SiO4
β“˜ 'Fergusonite'
β“˜ Fluorite
Formula: CaF2
β“˜ Fluorite var. Yttrocerite ?
Formula: (Ca,Y,Ce)F2+x
β“˜ 'Gadolinite' ?
Description: Unconfirmed. Collected 1920. ID based on resemblence to gadolinite from Texas, though a qualitative analysis is lacking (McKinstry, 1921: Minerals of Rockport, Mass; AmMin 6:59).
β“˜ Grunerite
Formula: ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2
β“˜ Hastingsite ?
Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
β“˜ Hedenbergite
Formula: CaFe2+Si2O6
β“˜ Hematite
Formula: Fe2O3
β“˜ Ilmenite
Formula: Fe2+TiO3
β“˜ 'Limonite'
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
β“˜ Microcline
Formula: K(AlSi3O8)
β“˜ Molybdenite
Formula: MoS2
β“˜ Quartz
Formula: SiO2
β“˜ Quartz var. Blue Quartz
Formula: SiO2
β“˜ Quartz var. Smoky Quartz
Formula: SiO2
β“˜ Thorite
Formula: Th(SiO4)
β“˜ Zircon
Formula: Zr(SiO4)
β“˜ Zircon var. Cyrtolite
Formula: Zr[(SiO4),(OH)4]

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Molybdenite2.EA.30MoS2
Group 3 - Halides
β“˜Fluorite
var. Yttrocerite ?		3.AB.25(Ca,Y,Ce)F2+x
β“˜3.AB.25CaF2
Group 4 - Oxides and Hydroxides
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Hematite4.CB.05Fe2O3
β“˜Ilmenite4.CB.05Fe2+TiO3
β“˜Quartz
var. Smoky Quartz		4.DA.05SiO2
β“˜var. Blue Quartz4.DA.05SiO2
β“˜4.DA.05SiO2
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
Group 9 - Silicates
β“˜Fayalite9.AC.05Fe2+2SiO4
β“˜Zircon
var. Cyrtolite		9.AD.30Zr[(SiO4),(OH)4]
β“˜9.AD.30Zr(SiO4)
β“˜Thorite9.AD.30Th(SiO4)
β“˜Hedenbergite9.DA.15CaFe2+Si2O6
β“˜Astrophyllite9.DC.05K2NaFe2+7Ti2Si8O26(OH)4F
β“˜Grunerite9.DE.05β—»{Fe2+2}{Fe2+5}(Si8O22)(OH)2
β“˜Actinolite ?9.DE.10β—»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜Hastingsite ?9.DE.15NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Danalite9.FB.10Be3Fe2+4(SiO4)3S
Unclassified
β“˜'Limonite'-
β“˜'Gadolinite' ?-
β“˜'Fergusonite'-
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Apatite'-Ca5(PO4)3(Cl/F/OH)
β“˜'Allanite Group'-(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)

List of minerals for each chemical element

HHydrogen
Hβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hβ“˜ AstrophylliteK2NaFe72+Ti2Si8O26(OH)4F
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ Grunerite◻{Fe22+}{Fe52+}(Si8O22)(OH)2
Hβ“˜ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Hβ“˜ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Hβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Hβ“˜ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
BeBeryllium
Beβ“˜ DanaliteBe3Fe42+(SiO4)3S
CCarbon
Cβ“˜ CalciteCaCO3
OOxygen
Oβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oβ“˜ AstrophylliteK2NaFe72+Ti2Si8O26(OH)4F
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ CalciteCaCO3
Oβ“˜ DanaliteBe3Fe42+(SiO4)3S
Oβ“˜ FayaliteFe22+SiO4
Oβ“˜ Grunerite◻{Fe22+}{Fe52+}(Si8O22)(OH)2
Oβ“˜ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Oβ“˜ HedenbergiteCaFe2+Si2O6
Oβ“˜ HematiteFe2O3
Oβ“˜ IlmeniteFe2+TiO3
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ QuartzSiO2
Oβ“˜ Quartz var. Smoky QuartzSiO2
Oβ“˜ ThoriteTh(SiO4)
Oβ“˜ ZirconZr(SiO4)
Oβ“˜ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Oβ“˜ Quartz var. Blue QuartzSiO2
Oβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
Oβ“˜ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
FFluorine
Fβ“˜ AstrophylliteK2NaFe72+Ti2Si8O26(OH)4F
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fβ“˜ FluoriteCaF2
Fβ“˜ Fluorite var. Yttrocerite(Ca,Y,Ce)F2+x
Fβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naβ“˜ AstrophylliteK2NaFe72+Ti2Si8O26(OH)4F
Naβ“˜ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
MgMagnesium
Mgβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Alβ“˜ MicroclineK(AlSi3O8)
SiSilicon
Siβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siβ“˜ AstrophylliteK2NaFe72+Ti2Si8O26(OH)4F
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ DanaliteBe3Fe42+(SiO4)3S
Siβ“˜ FayaliteFe22+SiO4
Siβ“˜ Grunerite◻{Fe22+}{Fe52+}(Si8O22)(OH)2
Siβ“˜ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Siβ“˜ HedenbergiteCaFe2+Si2O6
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ QuartzSiO2
Siβ“˜ Quartz var. Smoky QuartzSiO2
Siβ“˜ ThoriteTh(SiO4)
Siβ“˜ ZirconZr(SiO4)
Siβ“˜ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
Siβ“˜ Quartz var. Blue QuartzSiO2
Siβ“˜ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
PPhosphorus
Pβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sβ“˜ DanaliteBe3Fe42+(SiO4)3S
Sβ“˜ MolybdeniteMoS2
ClChlorine
Clβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kβ“˜ AstrophylliteK2NaFe72+Ti2Si8O26(OH)4F
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ MicroclineK(AlSi3O8)
CaCalcium
Caβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caβ“˜ CalciteCaCO3
Caβ“˜ FluoriteCaF2
Caβ“˜ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Caβ“˜ HedenbergiteCaFe2+Si2O6
Caβ“˜ Fluorite var. Yttrocerite(Ca,Y,Ce)F2+x
Caβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiβ“˜ AstrophylliteK2NaFe72+Ti2Si8O26(OH)4F
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiβ“˜ IlmeniteFe2+TiO3
FeIron
Feβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feβ“˜ AstrophylliteK2NaFe72+Ti2Si8O26(OH)4F
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ DanaliteBe3Fe42+(SiO4)3S
Feβ“˜ FayaliteFe22+SiO4
Feβ“˜ Grunerite◻{Fe22+}{Fe52+}(Si8O22)(OH)2
Feβ“˜ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Feβ“˜ HedenbergiteCaFe2+Si2O6
Feβ“˜ HematiteFe2O3
Feβ“˜ IlmeniteFe2+TiO3
Feβ“˜ MagnetiteFe2+Fe23+O4
YYttrium
Yβ“˜ Fluorite var. Yttrocerite(Ca,Y,Ce)F2+x
ZrZirconium
Zrβ“˜ ZirconZr(SiO4)
Zrβ“˜ Zircon var. CyrtoliteZr[(SiO4),(OH)4]
MoMolybdenum
Moβ“˜ MolybdeniteMoS2
CeCerium
Ceβ“˜ Fluorite var. Yttrocerite(Ca,Y,Ce)F2+x
ThThorium
Thβ“˜ ThoriteTh(SiO4)

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

Atlantic OceanOcean
North America PlateTectonic Plate

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

Merrill, George P. (1889): The Collection of Building and Ornamental Stones in the U.S. National Museum, p. 554.
Sears, J. H. (1894): Geological and Mineralogical Notes, No. 9 in Bulletin of the Essex Institute, vol. 26.
Sears, J. H.(1905): The Physical Geography, Geology, Mineralogy and Paleontology of Essex County.
Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI (USGS Bulletin 354).
Brayley, Arthur Wellington (1913) History of the Granite Industry of New England Vol. 1. National Association of Granite Industries of the United States, Boston, Mass. USA. p.1-266.
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