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Rockside Quarry (Mine Hill Quarry), Mine Hill (Ore Hill), Roxbury, Litchfield County, Connecticut, USAi
Regional Level Types
Rockside Quarry (Mine Hill Quarry)Quarry (Abandoned)
Mine Hill (Ore Hill)Hill
RoxburyTown
Litchfield CountyCounty
ConnecticutState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
41° 34' 14'' North , 73° 20' 16'' West
Latitude & Longitude (decimal):
41.57083,-73.33778
GeoHash:
G#: dr7u7ptp9
GRN:
N28W40
Type:
Quarry (Abandoned) - last checked 2023
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
New Milford6,523 (2017)5.9km
Washington3,466 (2017)7.1km
Woodbury9,755 (2017)11.1km
Woodbury Center1,294 (2017)11.4km
New Preston1,182 (2017)11.6km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Danbury Mineralogical SocietyDanbury, Connecticut22km
Bristol Gem & Mineral ClubBristol, Connecticut34km
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut44km
New Haven Mineral ClubNew Haven, Connecticut45km
Mindat Locality ID:
18312
Long-form identifier:
mindat:1:2:18312:0
GUID (UUID V4):
f5a6af10-61d2-4ebb-80b7-a284da695a34


A quarry complex working the Mine Hill Granite Gneiss (mapped as one of many similar Ordovician plutons in western Connecticut) situated at the eastern base of Mine Hill and now within the Roxbury Land Trust's Mine Hill Preserve. According to Dale and Gregory (1911) this dimension stone quarry began operations in 1890 (though Pawloski (2006) mentions quarrying as early as 1837, this was at different quarries on the hill to the south). It closed in 1935, but was briefly re-opened in 1952 by Charles Showalter, who moved his operations to the upper quarry. Bell and Mayerfeld (1982) mapped the area and show that one of the numerous siderite-rich veins found on the hill intersects the quarry. Dale and Gregory (1911) describe it thus:

"Within the second heading from the south end is a mineral vein up to 8 inches thick, which tapers out horizontally at a point 200 feet from the east side of the quarry. It contains pyrite, chalcopyrite, siderite, galenite [sic], and secondary quartz coating crystals of siderite. Similar veins occur in the first and third headings. These are evidently all related to the larger siderite vein which was formerly mined on the hill and to which it owes its name."

The minerals listed are either from the veins or are rock forming or accessory minerals in the gneiss.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


24 valid minerals.

Detailed Mineral List:

β“˜ Albite
Formula: Na(AlSi3O8)
Habit: anhedral
Colour: white
Description: reported as oligoclase to oligoclase-andesine
β“˜ Almandine
Formula: Fe2+3Al2(SiO4)3
β“˜ Anatase
Formula: TiO2
Colour: indigo-blue
Description: As indigo-blue microcrystals embedded in calcite; associated with: quartz, tourmaline, and muscovite.
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Habit: anhedral
Colour: black
Description: rock-forming mineral
β“˜ Bismuth
Formula: Bi
Habit: grains
Colour: silver-white with pinkish tinge
Description: Tiny grain-like masses, silver-white in color with a characteristic pinkish tinge; embedded in quartz. (x-rayed) (Januzzi, 1976, 1994)
β“˜ Bismuthinite
Formula: Bi2S3
Habit: acicular, capillary
Description: Occurs as tiny slender prismatic crystals and capillary inclusions (hair-like crystals) in quartz intimately associated with bismutite an alteration product of primary bismuth minerals.
β“˜ Bismutite
Formula: (BiO)2CO3
Habit: pseudomorphous after bismuthinite
Colour: grayish black
Description: Occurs as fine grained grayish black pseudomorphs after bismuthinite
β“˜ Brookite ?
Formula: TiO2
Habit: tabular, rectangular, "lathshaped"
Colour: very pale straw yellow, hair brown
Description: hair-brown lathshaped crystals intimately associated with anatase; occurs in veins of the Alpine type. (Januzzi 1976, p. 277)
β“˜ Calcite
Formula: CaCO3
Habit: anhedral
Description: A secondary mineral in the granite gneiss.
β“˜ Chalcopyrite
Formula: CuFeS2
Description: In veins in the gneiss associated with pyrite, siderite, galena, quartz.
β“˜ Copiapite
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Habit: encrustaion
Colour: yellow
Description: In a quartz vein at the north end of the quarry yellow copiapite is forming through the alteration of pyrite.
β“˜ Fluorapatite
Formula: Ca5(PO4)3F
Description: Accessory mineral in the granite gneiss.
β“˜ Fluorite
Formula: CaF2
β“˜ Galena
Formula: PbS
Description: In veins in the gneiss associated with pyrite, siderite, chalcopyrite, quartz.
β“˜ Kaolinite
Formula: Al2(Si2O5)(OH)4
Description: A secondary mineral in the granite gneiss.
β“˜ 'Limonite'
β“˜ Microcline
Formula: K(AlSi3O8)
Habit: anhedral
Description: A constituent of the granite gneiss.
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: anhedral
Description: As a constituent of the gneiss.
β“˜ Orthoclase
Formula: K(AlSi3O8)
Habit: anhedral
Description: As a constituent of the gneiss.
β“˜ Pyrite
Formula: FeS2
Description: In veins in the gneiss associated with chalcopyrite, siderite, galena, quartz.
β“˜ Quartz
Formula: SiO2
Description: In veins in the gneiss associated with pyrite, siderite, galena, chalcopyrite. Also as an constituent of the granite gneiss
β“˜ Quartz var. Amethyst
Formula: SiO2
Habit: scepter overgrowths
Colour: pale purple
Description: Lightly colored scepter overgrowths in faulted gneiss.
β“˜ Quartz var. Smoky Quartz
Formula: SiO2
Habit: anhedral
Colour: smoky
Description: As a constituent of the gneiss and in numerous small veins.
β“˜ Rutile
Formula: TiO2
Habit: geniculated and cyclic twins
Colour: Dark greenish-yellow
Description: As micro-twinned crystals- both geniculated and cyclic twinning has been noted; associated with quartz and siderite. (x-rayed)
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜ Siderite
Formula: FeCO3
β“˜ Sphalerite
Formula: ZnS
Habit: anhedral
Description: Seams containing sphalerite have been seen in the gneiss of the quarry.
β“˜ Zircon
Formula: Zr(SiO4)
Description: As a accessory constituent of the gneiss.

Gallery:

SiO2β“˜ Quartz

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Bismuth1.CA.05Bi
Group 2 - Sulphides and Sulfosalts
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Galena2.CD.10PbS
β“˜Bismuthinite2.DB.05Bi2S3
β“˜Pyrite2.EB.05aFeS2
Group 3 - Halides
β“˜Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
β“˜Quartz
var. Smoky Quartz		4.DA.05SiO2
β“˜var. Amethyst4.DA.05SiO2
β“˜4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
β“˜Anatase4.DD.05TiO2
β“˜Brookite ?4.DD.10TiO2
Group 5 - Nitrates and Carbonates
β“˜Siderite5.AB.05FeCO3
β“˜Calcite5.AB.05CaCO3
β“˜Bismutite5.BE.25(BiO)2CO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Copiapite7.DB.35Fe2+Fe3+4(SO4)6(OH)2 Β· 20H2O
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
β“˜Almandine9.AD.25Fe2+3Al2(SiO4)3
β“˜Zircon9.AD.30Zr(SiO4)
β“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Kaolinite9.ED.05Al2(Si2O5)(OH)4
β“˜Orthoclase9.FA.30K(AlSi3O8)
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Albite9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Limonite'-
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

List of minerals for each chemical element

HHydrogen
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Hβ“˜ KaoliniteAl2(Si2O5)(OH)4
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
Cβ“˜ Bismutite(BiO)2CO3
Cβ“˜ CalciteCaCO3
Cβ“˜ SideriteFeCO3
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ Quartz var. AmethystSiO2
Oβ“˜ AnataseTiO2
Oβ“˜ AlmandineFe32+Al2(SiO4)3
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ Bismutite(BiO)2CO3
Oβ“˜ BrookiteTiO2
Oβ“˜ CalciteCaCO3
Oβ“˜ CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Oβ“˜ FluorapatiteCa5(PO4)3F
Oβ“˜ KaoliniteAl2(Si2O5)(OH)4
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ OrthoclaseK(AlSi3O8)
Oβ“˜ QuartzSiO2
Oβ“˜ RutileTiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ SideriteFeCO3
Oβ“˜ Quartz var. Smoky QuartzSiO2
Oβ“˜ ZirconZr(SiO4)
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fβ“˜ FluorapatiteCa5(PO4)3F
Fβ“˜ FluoriteCaF2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AlmandineFe32+Al2(SiO4)3
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ KaoliniteAl2(Si2O5)(OH)4
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ OrthoclaseK(AlSi3O8)
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ Quartz var. AmethystSiO2
Siβ“˜ AlmandineFe32+Al2(SiO4)3
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ KaoliniteAl2(Si2O5)(OH)4
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ OrthoclaseK(AlSi3O8)
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ Quartz var. Smoky QuartzSiO2
Siβ“˜ ZirconZr(SiO4)
PPhosphorus
Pβ“˜ FluorapatiteCa5(PO4)3F
SSulfur
Sβ“˜ BismuthiniteBi2S3
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Sβ“˜ GalenaPbS
Sβ“˜ PyriteFeS2
Sβ“˜ SphaleriteZnS
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ OrthoclaseK(AlSi3O8)
CaCalcium
Caβ“˜ CalciteCaCO3
Caβ“˜ FluorapatiteCa5(PO4)3F
Caβ“˜ FluoriteCaF2
TiTitanium
Tiβ“˜ AnataseTiO2
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiβ“˜ BrookiteTiO2
Tiβ“˜ RutileTiO2
FeIron
Feβ“˜ AlmandineFe32+Al2(SiO4)3
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Feβ“˜ PyriteFeS2
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Feβ“˜ SideriteFeCO3
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
ZnZinc
Znβ“˜ SphaleriteZnS
ZrZirconium
Zrβ“˜ ZirconZr(SiO4)
PbLead
Pbβ“˜ GalenaPbS
BiBismuth
Biβ“˜ BismuthBi
Biβ“˜ BismuthiniteBi2S3
Biβ“˜ Bismutite(BiO)2CO3

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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

Dale, T. Nelson and Herbert E. Gregory. (1911): The Granites of Connecticut. USGS Bulletin 484. pp. 70-71.
Januzzi, Ronald (1959) The Minerals of Western Connecticut and Southeastern New York State.. The Mineralogical Press, Danbury, Connecticut.
Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Hull, Daniel R. (1966): Bewitched Mine Hill, The Silver-Lead-Iron Mine of Roxbury, Connecticut. The Old Woodbury Historical Society, Woodbury, Connecticut.
Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA.
Bell and Mayerfeld (1982): Time and Land: The Story of Mine Hill (Roxbury Land Trust; and Yale School of Forestry and Envirnomental Studies).
Bell and Mayerfeld (1982) can be found here - http://www.roxburylandtrust.org/minehill.html
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 399.
Pawloski, John A. (2006). Connecticut Mining (Mt. Pleasant, SC: Arcadia Publishing) pp. 79-81.
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