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


04434680017364842804528.jpg
Prehnite, etc.

Gainesville Quarry, Gainesville, Prince William County, Virginia, USA
04434680017364842804528.jpg
Prehnite, etc.

Gainesville Quarry, Gainesville, Prince William County, Virginia, USA
03047020017272030331356.jpg
Prehnite, etc.

Gainesville Quarry, Gainesville, Prince William County, Virginia, USA
Locality type:Quarry
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Calcite2
Quartz1
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Gainesville Quarry, Gainesville, Prince William County, Virginia, USA
Data Identifiers
Mindat Occurrence Record ID:65710
Long-form Identifier:1:3:65710:9
GUID (UUID V4):0
Nearest other occurrences of Prehnite
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
10.1km (6.3 miles) ⓘBull Run Quarry, Conklin, Loudoun County, Virginia, USA
10.6km (6.6 miles) ⓘFairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
15.9km (9.9 miles) ⓘManassas Quarry, Fairfax County, Virginia, USA
16.1km (10.0 miles) ⓘCentreville, Culpeper Basin, Fairfax County, Virginia, USA
18.1km (11.2 miles) ⓘVirginia Crushed Stone Quarry, Loudoun County, Virginia, USA
18.3km (11.4 miles) ⓘChantilly Quarry, Chantilly, Loudoun County, Virginia, USA
18.6km (11.5 miles) ⓘQuarry (MRDS - 10184216), Warrenton, Fauquier County, Virginia, USA
29.1km (18.1 miles) ⓘLuck Stone Quarry (Luckstone Quarry), Bealeton, Fauquier County, Virginia, USA
References
Rocks & Min.:60:168.
 
and/or  
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