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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Vermiculite from
Wissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA


Locality type:Valley
Classification
Species:Vermiculite
Formula:Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Vermiculite data
Locality Data:Click here to view Wissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:320628
Long-form Identifier:1:3:320628:7
GUID (UUID V4):0
Nearest other occurrences of Vermiculite
4.9km (3.0 miles) ⓘRidge Avenue and School Lane Quarries, East Falls, Fairmount Park, Philadelphia, Philadelphia County, Pennsylvania, USA
10.4km (6.5 miles) ⓘJerry O'Neill's Quarry, Tacony Creek Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
22.6km (14.0 miles) ⓘFeldspar Quarry, Mineral Hill, Elwyn, Middletown Township, Delaware County, Pennsylvania, USA
35.8km (22.3 miles) ⓘBrinton's Quarry, Westtown Township, Chester County, Pennsylvania, USA
51.5km (32.0 miles) ⓘMoore's Station, Hopewell Township, Mercer County, New Jersey, USA
59.2km (36.8 miles) ⓘMartin A. Howell Quarry, Princeton, Mercer County, New Jersey, USA
73.5km (45.6 miles) ⓘChestnut Hill, Easton, Northampton County, Pennsylvania, USA
78.6km (48.8 miles) ⓘSylmar, West Nottingham Township, Chester County, Pennsylvania, USA
86.7km (53.9 miles) ⓘCedar Hill Quarry (Stoltzfuss Quarry), Fulton Township, Lancaster County, Pennsylvania, USA
87.6km (54.5 miles) ⓘHaines & Kibblehouse Penn-Maryland Materials Quarry, Fulton Township, Lancaster County, Pennsylvania, USA
References
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia 255pp.
 
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