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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Apophyllite Group from
Gainesville Quarry, Gainesville, Prince William County, Virginia, USA


Locality type:Quarry
Classification
Species:'Apophyllite Group' (not an IMA approved species)
Formula:AB4[Si8O20]X · 8H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Apophyllite Group data
Locality Data:Click here to view Gainesville Quarry, Gainesville, Prince William County, Virginia, USA
Data Identifiers
Mindat Occurrence Record ID:65705
Long-form Identifier:1:3:65705:7
GUID (UUID V4):0
Nearest other occurrences of Apophyllite Group
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
16.1km (10.0 miles) ⓘCentreville, Culpeper Basin, Fairfax County, Virginia, USA
17.0km (10.6 miles) ⓘSanders Quarry, Casanova, Fauquier County, Virginia, USA
29.1km (18.1 miles) ⓘLuck Stone Quarry (Luckstone Quarry), Bealeton, Fauquier County, Virginia, USA
36.4km (22.6 miles) ⓘWhite Quarry, Leesburg, Loudoun County, Virginia, USA
61.1km (38.0 miles) ⓘCedar Mountain Stone Corp. Quarry (A. H. Smith quarry), Mitchell, Culpeper County, Virginia, USA
References
Rocks & Min.:60:168.
 
and/or  
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