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
Lamberton Branch locality, Silver Spring, Montgomery County, Maryland, USA


Classification
Species:Pyrite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Lamberton Branch locality, Silver Spring, Montgomery County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:207337
Long-form Identifier:1:3:207337:8
GUID (UUID V4):0
Nearest other occurrences of Pyrite
2.6km (1.6 miles) ⓘWhite Oak, Montgomery County, Maryland, USA
8.1km (5.1 miles) ⓘRock Creek, Montgomery County, Maryland, USA
10.6km (6.6 miles) ⓘAyrlawn Park, Bethesda, Montgomery County, Maryland, USA
11.4km (7.1 miles) ⓘHuddlestone Mine, Rockville, Montgomery County, Maryland, USA
12.0km (7.5 miles) ⓘSoapstone Valley, NW Washington, District of Columbia (Washington D.C.), USA
16.6km (10.3 miles) ⓘBrighton Dam Road Quarry (Howard-Montgomery Quarry), Howard County, Maryland, USA
17.8km (11.1 miles) ⓘMontgomery Mine (Potomac Mine), Potomac, Montgomery County, Maryland, USA
18.0km (11.2 miles) ⓘSawyer Mine, Cropley, Montgomery County, Maryland, USA
18.0km (11.2 miles) ⓘSavage Gabbro Quarry, Savage, Howard County, Maryland, USA
18.4km (11.4 miles) ⓘHarrison Mine (Potomac), Cropley, Montgomery 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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