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Ellicott City, Howard County, Maryland, USAi
Regional Level Types
Ellicott CityCensus-designated Place
Howard CountyCounty
MarylandState
USACountry

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PhotosMapsSearchMineralogy
07851510017272071716360.jpg
Quartz, etc.

Ellicott City, Howard County, Maryland, USA
05682920017272071721203.jpg
Biotite, etc.

Ellicott City, Howard County, Maryland, USA
07851510017272071716360.jpg
Quartz, etc.

Ellicott City, Howard County, Maryland, USA
05682920017272071721203.jpg
Biotite, etc.

Ellicott City, Howard County, Maryland, USA
06198730017272071734639.jpg
Quartz, etc.

Ellicott City, Howard County, Maryland, USA
05682920017272071721203.jpg
Biotite, etc.

Ellicott City, Howard County, Maryland, USA
Latitude & Longitude (WGS84):
39° 16' 2'' North , 76° 47' 53'' West
Latitude & Longitude (decimal):
39.26733,-76.79831
GRN:
N27W43
Type:
Census-designated Place
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Ellicott City65,834 (2011)0.0km
Ilchester23,476 (2011)3.4km
Columbia99,615 (2011)4.6km
Catonsville41,567 (2011)5.7km
Trial1,000 (2012)6.3km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Central Maryland Rock and Mineral Collectors ExchangeElkridge, Maryland9km
Baltimore Mineral SocietyBaltimore, Maryland16km
Chesapeake Gem & Mineral SocietyBaltimore, Maryland16km
Gem Cutters Guild of Baltimore, Inc.Baltimore, Maryland16km
American Fossil FederationBowie, Maryland37km
Mindat Locality ID:
42724
Long-form identifier:
mindat:1:2:42724:6
GUID (UUID V4):
0


Several granite quarries, now covered over, operated just east of the city. Pegmatite dike swarms are known in the area. In 1860, a 45-pound smoky quartz crystal (the "Mitchell crystal") was reportedly dug up with many others found in float from a farm west of town (Nagy, 2017).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

12 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
References:
USGS Bull. 426
ⓘ Albite var. Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
References:
USGS Bull. 426
ⓘ 'Allanite Group'
Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
References:
USGS Bull. 426
ⓘ 'Apatite'
Formula: Ca5(PO4)3A
References:
USGS Bull. 426
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Calcite
Formula: CaCO3
Description: with pyrite, galena, chalcopyrite in a calcite lens calcite, in a chlorite schist labelled as coming from Ellicott City is in the Smithsonian Collections
ⓘ Chalcopyrite
Formula: CuFeS2
Description: with pyrite, galena, chalcopyrite in a calcite lens calcite, in a chlorite schist labelled as coming from Ellicott City is in the Smithsonian Collections
ⓘ 'Chlorite Group'
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
References:
USGS Bull. 426
ⓘ 'Fayalite-Forsterite Series'
ⓘ 'Feldspar Group'
ⓘ Galena
Formula: PbS
Description: with pyrite, galena, chalcopyrite in a calcite lens calcite, in a chlorite schist labelled as coming from Ellicott City is in the Smithsonian Collections
ⓘ 'Mica Group'
ⓘ Microcline
Formula: K(AlSi3O8)
References:
USGS Bull. 426
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
References:
USGS Bull. 426
ⓘ Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
ⓘ Orthoclase
Formula: K(AlSi3O8)
References:
USGS Bull. 426
ⓘ Pyrite
Formula: FeS2
Description: with pyrite, galena, chalcopyrite in a calcite lens calcite, in a chlorite schist labelled as coming from Ellicott City is in the Smithsonian Collections
ⓘ Quartz
Formula: SiO2
ⓘ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
ⓘ Zircon
Formula: Zr(SiO4)
References:
USGS Bull. 426

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘZircon9.AD.30Zr(SiO4)
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘNontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘOrthoclase9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Feldspar Group'-
ⓘ'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
ⓘ'Mica Group'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Apatite'-Ca5(PO4)3A
ⓘ'Allanite Group'-(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](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ⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Hⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Hⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CalciteCaCO3
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ MicroclineK(AlSi3O8)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Oⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Oⓘ OrthoclaseK(AlSi3O8)
Oⓘ QuartzSiO2
Oⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oⓘ ZirconZr(SiO4)
Oⓘ Fayalite-Forsterite Series
Oⓘ ApatiteCa5(PO4)3A
Oⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Naⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Alⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Alⓘ OrthoclaseK(AlSi3O8)
Alⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Siⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Siⓘ OrthoclaseK(AlSi3O8)
Siⓘ QuartzSiO2
Siⓘ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siⓘ ZirconZr(SiO4)
Siⓘ Fayalite-Forsterite Series
Siⓘ Allanite Group(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
PPhosphorus
Pⓘ ApatiteCa5(PO4)3A
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ PyriteFeS2
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ OrthoclaseK(AlSi3O8)
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ Albite var. Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
Caⓘ ApatiteCa5(PO4)3A
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ⓘ ChalcopyriteCuFeS2
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Feⓘ PyriteFeS2
Feⓘ Fayalite-Forsterite Series
CuCopper
Cuⓘ ChalcopyriteCuFeS2
ZrZirconium
Zrⓘ ZirconZr(SiO4)
PbLead
Pbⓘ GalenaPbS

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Ellicott_City,_Maryland
Wikidata ID:Q730938
GeoNames ID:4354265

Localities in this Region

USA

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

Ostrander, Charles W., Price, Jr, Walter E. (1940) Minerals of Maryland. The Natural History Society of Maryland, Baltimore, Maryland, USA. 14pp.
Bernstein, Lawrence R. (1980) Minerals of the Washington, D.C. Area - Issue 5 of Educational series, Maryland Geological Survey. Department of Natural Resources, Maryland Geological Survey. p.1-148.
Nagy, J. W. (2017) The Mitchell Crystal: a Maryland mineralogical enigma: Rocks and Minerals 92 (2): 158-160.
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