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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Actinolite from
Gainesville Quarry, Gainesville, Prince William County, Virginia, USA


Locality type:Quarry
Classification
Species:Actinolite
Formula:◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Actinolite data
Locality Data:Click here to view Gainesville Quarry, Gainesville, Prince William County, Virginia, USA
Data Identifiers
Mindat Occurrence Record ID:65703
Long-form Identifier:1:3:65703:9
GUID (UUID V4):0
Nearest other occurrences of Actinolite
6.7km (4.2 miles) ⓘVulcan Materials Company Crushed Stone Quarry (Manassas Quarry), Manassas, Prince William County, Virginia, USA
9.9km (6.1 miles) ⓘMillbrook Quarry (Haymarket Quarry), Haymarket, Prince William County, Virginia, USA
10.6km (6.6 miles) ⓘFairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
23.3km (14.5 miles) ⓘHighway 50 intersection, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
27.8km (17.3 miles) ⓘLoudon Marble Company Quarry, Loudoun County, Virginia, USA
28.7km (17.8 miles) ⓘVeasco Quarry (MRDS - 10276445), Oatlands, Loudoun County, Virginia, USA
31.9km (19.8 miles) ⓘCabin Branch Mine (Dumfries Mine), Dumfries, Gold-Pyrite Belt, Prince William County, Virginia, USA
32.5km (20.2 miles) ⓘNew Goose Creek Quarry, Leesburg, Loudoun County, Virginia, USA
35.5km (22.0 miles) ⓘPotomac Mine, Leesburg, Loudoun County, Virginia, USA
46.1km (28.6 miles) ⓘHunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
References
Rocks & Min.:60:168.
 
and/or  
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