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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Epidote from
Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA


Locality type:Quarry
Classification
Species:Epidote
Formula:(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Epidote data
Locality Data:Click here to view Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:46598
Long-form Identifier:1:3:46598:8
GUID (UUID V4):0
Nearest other occurrences of Epidote
7.4km (4.6 miles) ⓘGaithersburg, Montgomery County, Maryland, USA
11.4km (7.1 miles) ⓘDifficult Run, Fairfax County, Virginia, USA
19.0km (11.8 miles) ⓘLamberton Branch locality, Silver Spring, Montgomery County, Maryland, USA
22.2km (13.8 miles) ⓘTheodora Mine, Herndon, Fairfax County, Virginia, USA
23.7km (14.7 miles) ⓘDickerson Trap Rock Quarries, Dickerson, Montgomery County, Maryland, USA
24.2km (15.0 miles) ⓘGoose Creek Mine (Eagle Mine), Culpeper Basin, Loudoun County, Virginia, USA
25.0km (15.6 miles) ⓘOld Goose Creek Quarry, Leesburg, Loudoun County, Virginia, USA
25.0km (15.6 miles) ⓘNew Goose Creek Quarry, Leesburg, Loudoun County, Virginia, USA
28.0km (17.4 miles) ⓘPotomac Mine, Leesburg, Loudoun County, Virginia, USA
32.1km (19.9 miles) ⓘManassas Quarry, Fairfax County, Virginia, 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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