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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Stonyhurst Quarries, Montgomery County, Maryland, USAi
Regional Level Types
Stonyhurst QuarriesGroup of Quarries
Montgomery CountyCounty
MarylandState
USACountry

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Latitude & Longitude (WGS84):
39° 0' 39'' North , 77° 9' 30'' West
Latitude & Longitude (decimal):
39.01083,-77.15833
GeoHash:
G#: dqcjujxn8
GRN:
N27W43
Type:
Group of Quarries
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Cabin John2,280 (2011)3.9km
Potomac44,965 (2011)4.4km
Glen Echo272 (2017)4.8km
North Bethesda43,828 (2013)5.1km
Bethesda60,858 (2018)6.0km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Gem, Lapidary, and Mineral Society of Montgomery County, MD., Inc.Rockville, Maryland8km
Northern Virginia Mineral Club, Inc.Arlington, Virginia15km
Southern Maryland Rock and Mineral ClubClinton, Maryland35km
American Fossil FederationBowie, Maryland38km
Maryland Geological SocietyBowie, Maryland38km
Mindat Locality ID:
143131
Long-form identifier:
mindat:1:2:143131:8
GUID (UUID V4):
0


Commodities (Major) - Stone
Development Status: Past Producer - Maryland Ceramic and Steatite Company, Inc.

List of minerals for each chemical element

Other Databases

Link to USGS MRDS:10099755

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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