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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Pyrite from
Brighton Dam Road Quarry (Howard-Montgomery Quarry), Howard County, Maryland, USA


02491070017272013029119.jpg
Pyrite

Brighton Dam Road Quarry, Howard County, Maryland, USA
06205160017272013184552.jpg
Pyrite, etc.

Brighton Dam Road Quarry, Howard County, Maryland, USA
02662600017272013211962.jpg
Pyrite, etc.

Brighton Dam Road Quarry, Howard County, Maryland, USA
01586910017272012989673.jpg
Pyrite

Brighton Dam Road Quarry, Howard County, Maryland, USA
06784290017365583182144.jpg
Pyrite

Brighton Dam Road Quarry, Howard County, Maryland, USA
00556880017365583191746.jpg
Pyrite, etc.

Brighton Dam Road Quarry, Howard County, Maryland, USA
04378290017365583194042.jpg
Pyrite, etc.

Brighton Dam Road Quarry, Howard County, Maryland, USA
08618800017365583196115.jpg
Pyrite

Brighton Dam Road Quarry, Howard County, Maryland, USA
02491070017272013029119.jpg
Pyrite

Brighton Dam Road Quarry, Howard County, Maryland, USA
06205160017272013184552.jpg
Pyrite, etc.

Brighton Dam Road Quarry, Howard County, Maryland, USA
02662600017272013211962.jpg
Pyrite, etc.

Brighton Dam Road Quarry, Howard County, Maryland, USA
00399140017272013151000.jpg
Pyrite

Brighton Dam Road Quarry, Howard County, Maryland, USA
Locality type:Quarry
Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Calcite2
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Brighton Dam Road Quarry (Howard-Montgomery Quarry), Howard County, Maryland, USA
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:9019
Long-form Identifier:1:3:9019:3
GUID (UUID V4):0
Nearest other occurrences of Pyrite
14.1km (8.8 miles) ⓘSavage Gabbro Quarry, Savage, Howard County, Maryland, USA
16.3km (10.1 miles) ⓘWhite Oak, Montgomery County, Maryland, USA
16.6km (10.3 miles) ⓘLamberton Branch locality, Silver Spring, Montgomery County, Maryland, USA
17.2km (10.7 miles) ⓘFrost Quarry, Davis, Howard County, Maryland, USA
17.7km (11.0 miles) ⓘWoodstock, Howard County, Maryland, USA
18.0km (11.2 miles) ⓘEllicott City, Howard County, Maryland, USA
18.6km (11.6 miles) ⓘOursler Talc Quarries, Carroll County, Maryland, USA
19.1km (11.9 miles) ⓘFlorence Mine, Sykesville, Carroll County, Maryland, USA
19.3km (12.0 miles) ⓘRuby Quarry; Ruby Flint, Carroll County, Maryland, USA
20.1km (12.5 miles) ⓘMarriottsville Talc Quarries, Carroll County, Maryland, USA
References
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.
 
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