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


Locality type:Valley
Classification
Species:Amphibole Supergroup var: Byssolite
Formula:AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Byssolite data
Locality Data:Click here to view Wissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:320623
Long-form Identifier:1:3:320623:2
GUID (UUID V4):0
Nearest other occurrences of Byssolite
44.8km (27.8 miles) ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
44.8km (27.8 miles) ⓘKeim's Mine, French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
45.3km (28.2 miles) ⓘKeystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, USA
48.8km (30.3 miles) ⓘWarwick Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
51.2km (31.8 miles) ⓘHopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
55.2km (34.3 miles) ⓘJones mine, Caernarvon Township, Berks County, Pennsylvania, USA
80.0km (49.7 miles) ⓘNorth East Quarry, Cecil County, Maryland, 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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