Vote for your favorite mineral in #MinCup26! - Bournonite vs. Vesuvianite
Cogwheels of bournonite are up against colourful vesuvianite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Sturbridge Graphite Mine (Tantiusques Mine; Winthrop Lead Mine), Sturbridge, Worcester County, Massachusetts, USAi
Regional Level Types
Sturbridge Graphite Mine (Tantiusques Mine; Winthrop Lead Mine)Mine
SturbridgeTown
Worcester CountyCounty
MassachusettsState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
06223020017272037999876.jpg
Sturbridge Graphite Mine (2009)

Sturbridge Graphite Mine, Sturbridge, Worcester County, Massachusetts, USA
05715100017272038005343.jpg
graphite vein

Sturbridge Graphite Mine, Sturbridge, Worcester County, Massachusetts, USA
06354470017272038017516.jpg
graphite and quartz veining

Sturbridge Graphite Mine, Sturbridge, Worcester County, Massachusetts, USA
06223020017272037999876.jpg
Sturbridge Graphite Mine (2009)

Sturbridge Graphite Mine, Sturbridge, Worcester County, Massachusetts, USA
05715100017272038005343.jpg
graphite vein

Sturbridge Graphite Mine, Sturbridge, Worcester County, Massachusetts, USA
06354470017272038017516.jpg
graphite and quartz veining

Sturbridge Graphite Mine, Sturbridge, Worcester County, Massachusetts, USA
01241870017272038082271.jpg
Sturbridge Graphite Mine (2009)

Sturbridge Graphite Mine, Sturbridge, Worcester County, Massachusetts, USA
05715100017272038005343.jpg
graphite vein

Sturbridge Graphite Mine, Sturbridge, Worcester County, Massachusetts, USA
Latitude & Longitude (WGS84):
42° 3' 25'' North , 72° 7' 51'' West
Latitude & Longitude (decimal):
42.05722,-72.13111
GeoHash:
G#: drkxq879p
GRN:
N29W39
Type:
Mine
Köppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Holland1,464 (2017)2.3km
Fiskdale2,583 (2017)6.7km
Sturbridge2,253 (2017)7.1km
Wales1,767 (2017)7.6km
Southbridge19,030 (2017)8.3km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Worcester Mineral ClubWorcester, Massachusetts35km
Connecticut Valley Mineral ClubSpringfield, Massachusetts38km
Mindat Locality ID:
15154
Long-form identifier:
mindat:1:2:15154:7
GUID (UUID V4):
0


Graphite ("black lead") was mined here by the Nipmuc to make ceremonial paints. John Winthrop the Younger (1606-1676) purchased the mine in 1644. Actual work did not begin until April 1658, and the mine seems to have been soon abandoned. Another John Winthrop, nephew of the original owner, started mining again in 1738 but ceased operations after a couple of years. There is no record of mining again until 1828-29 when Frederick Tudor (1783-1864) of Boston reopened the mine and operated it until his death in 1864. Purchased by the Massachusetts Graphite Company in 1902, it was operated occasionally until at least 1911.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


6 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Calcite
Formula: CaCO3
ⓘ Graphite
Formula: C
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrope
Formula: Mg3Al2(SiO4)3
Description: Very unlikely occurrence. Undoubtedly a different garnet.
ⓘ Quartz
Formula: SiO2
ⓘ Sillimanite
Formula: Al2(SiO4)O

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGraphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘPyrope ?9.AD.25Mg3Al2(SiO4)3
ⓘSillimanite9.AF.05Al2(SiO4)O
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cⓘ CalciteCaCO3
Cⓘ GraphiteC
OOxygen
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CalciteCaCO3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ PyropeMg3Al2(SiO4)3
Oⓘ QuartzSiO2
Oⓘ SillimaniteAl2(SiO4)O
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
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ⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ PyropeMg3Al2(SiO4)3
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ PyropeMg3Al2(SiO4)3
Alⓘ SillimaniteAl2(SiO4)O
Alⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ PyropeMg3Al2(SiO4)3
Siⓘ QuartzSiO2
Siⓘ SillimaniteAl2(SiO4)O
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
PPhosphorus
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ PyriteFeS2
ClChlorine
Clⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ PyriteFeS2

Other Regions, Features and Areas containing this locality

North AmericaContinent
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

www.thetrustees.org (n.d.) http://www.thetrustees.org/places-to-visit/central-ma/tantiusques.html
Hitchcock, Edward (1835) Report on the geology, mineralogy, botany, and zoology of Massachusetts (2nd ed.) J.S. and C. Adams, Amherst, MD. pp.57-58
Haynes, George H. (1901): The Tale of Tantiusques (Proceedings of the American Antiquarian Society, Volume 14, p. 471.)
Bastin, Edson S. (1912): Graphite (USGS: Mineral Resources of the United States, Part II Nonmetals, Calendar Year 1911)
Apfel, Earl T. (1944): Graphite Deposits Near Sturbridge, Massachusetts (USGS Open File Report)
Palache, Charles (1947): The Sturbridge, Mass., Graphite Mine. (Rocks & Minerals 22:502).
Skehan, James. (2001): Roadside Geology of Massachusetts (Mountain Press Publishing Co., Missoula MT), p. 238.
en.wikipedia.org (n.d.) https://en.wikipedia.org/wiki/Sturbridge,_Massachusetts
Quick NavTopCommoditiesMineral ListOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 4, 2026 11:47:19 Page updated: August 13, 2025 09:57:06
Go to top of page