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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Stilbite Subgroup from
Brandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA


Locality type:Quarry
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Brandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA
Data Identifiers
Mindat Occurrence Record ID:50040
Long-form Identifier:1:3:50040:3
GUID (UUID V4):0
Nearest other occurrences of Stilbite Subgroup
2.5km (1.5 miles) ⓘWilmington Granite Company Quarries, Wilmington, New Castle County, Delaware, USA
10.5km (6.5 miles) ⓘInterstate 95 roadcut, New Castle County, Delaware, USA
17.1km (10.6 miles) ⓘLenni, Middletown Township, Delaware County, Pennsylvania, USA
24.3km (15.1 miles) ⓘDeshong's Quarry, Leiperville, Ridley Township, Delaware County, Pennsylvania, USA
39.6km (24.6 miles) ⓘRock Hill Road, Pencoyd (West Manayunk), Lower Merion Township, Montgomery County, Pennsylvania, USA
41.0km (25.5 miles) ⓘFalls of Schuylkill, Fairmount Park, Philadelphia, Philadelphia County, Pennsylvania, USA
43.2km (26.8 miles) ⓘMcKinney's Quarry, Rittenhouse Lane, Philadelphia, Philadelphia County, Pennsylvania, USA
43.5km (27.0 miles) ⓘWissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
48.0km (29.8 miles) ⓘWilliam's Quarry, Frankford, Philadelphia, Philadelphia County, Pennsylvania, USA
48.1km (29.9 miles) ⓘHoffman's Quarry (Hoffmans Quarry), Frankford, Philadelphia, Philadelphia County, Pennsylvania, USA
References
Rocks & Min.:11:216
21:280-281
AmMin:9(1924):1-5.
 
and/or  
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