Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Bethesda, Montgomery County, Maryland, USAi
Regional Level Types
BethesdaCensus-designated Place
Montgomery CountyCounty
MarylandState
USACountry

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PhotosMapsSearch
09560440017361103405115.jpg
Top of the hill

Ayrlawn Park, Bethesda, Montgomery County, Maryland, USA
07457390017272052399299.jpg
Large schorl boulder

Ayrlawn Park, Bethesda, Montgomery County, Maryland, USA
02679290017272052401877.jpg
Schorl, etc.

Bethesda, Montgomery County, Maryland, USA
09560440017361103405115.jpg
Top of the hill

Ayrlawn Park, Bethesda, Montgomery County, Maryland, USA
07457390017272052399299.jpg
Large schorl boulder

Ayrlawn Park, Bethesda, Montgomery County, Maryland, USA
02679290017272052401877.jpg
Schorl, etc.

Bethesda, Montgomery County, Maryland, USA
09560440017361103405115.jpg
Top of the hill

Ayrlawn Park, Bethesda, Montgomery County, Maryland, USA
07457390017272052399299.jpg
Large schorl boulder

Ayrlawn Park, Bethesda, Montgomery County, Maryland, USA
Latitude & Longitude (WGS84):
38° 59' 6'' North , 77° 5' 42'' West
Latitude & Longitude (decimal):
38.98508,-77.09505
GeoHash:
G#: dqcjv9j0e
GRN:
N26W44
Type:
Census-designated Place
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Bethesda60,858 (2018)0.7km
Chevy Chase Section Five693 (2017)1.8km
Chevy Chase Section Three801 (2017)2.0km
Somerset1,288 (2017)2.1km
Chevy Chase Village2,060 (2017)2.2km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Northern Virginia Mineral Club, Inc.Arlington, Virginia12km
Gem, Lapidary, and Mineral Society of Montgomery County, MD., Inc.Rockville, Maryland12km
Southern Maryland Rock and Mineral ClubClinton, Maryland30km
American Fossil FederationBowie, Maryland32km
Maryland Geological SocietyBowie, Maryland32km
Mindat Locality ID:
23670
Long-form identifier:
mindat:1:2:23670:5
GUID (UUID V4):
0


An area in south Montgomery county, just northwest of Washington DC.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

7 valid minerals. 1 erroneous literature entry.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
Description: almandine, rare
ⓘ Goethite
Formula: Fe3+O(OH)
References:
Cameron Holden CollectionIdentified by Cameron Holden: Visual Identification
ⓘ Hematite
Formula: Fe2O3
Description: red coatings in schist and quartz
ⓘ 'Limonite'
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
References:
cameron holden
ⓘ Native Gold
Formula: Au
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Rock Crystal
Formula: SiO2
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ Staurolite
Formula: Fe2+2Al9Si4O23(OH)
Description: Misidentified, actually schorl

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘvar. Rock Crystal4.DA.05SiO2
Group 9 - Silicates
ⓘStaurolite ?9.AF.30Fe2+2Al9Si4O23(OH)
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Limonite'-
ⓘ'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
Hⓘ GoethiteFe3+O(OH)
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ StauroliteFe22+Al9Si4O23(OH)
BBoron
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oⓘ GoethiteFe3+O(OH)
Oⓘ HematiteFe2O3
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ StauroliteFe22+Al9Si4O23(OH)
Oⓘ Quartz var. Rock CrystalSiO2
Oⓘ Garnet GroupX3Z2(SiO4)3
NaSodium
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ StauroliteFe22+Al9Si4O23(OH)
SiSilicon
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ StauroliteFe22+Al9Si4O23(OH)
Siⓘ Quartz var. Rock CrystalSiO2
Siⓘ Garnet GroupX3Z2(SiO4)3
SSulfur
Sⓘ PyriteFeS2
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
FeIron
Feⓘ GoethiteFe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ PyriteFeS2
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Feⓘ StauroliteFe22+Al9Si4O23(OH)
AuGold
Auⓘ Native GoldAu

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Bethesda,_Maryland
Wikidata ID:Q584451
GeoNames ID:4348599

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.
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