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
Jones mine, Caernarvon Township, Berks County, Pennsylvania, USA


Locality type:Mine
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 Jones mine, Caernarvon Township, Berks County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:70508
Long-form Identifier:1:3:70508:0
GUID (UUID V4):0
Nearest other occurrences of Byssolite
4.1km (2.6 miles) ⓘHopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
6.4km (4.0 miles) ⓘWarwick Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA
11.3km (7.0 miles) ⓘKeim's Mine, French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
11.3km (7.0 miles) ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
13.6km (8.4 miles) ⓘKeystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, USA
55.2km (34.3 miles) ⓘWissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
63.9km (39.7 miles) ⓘNorth East Quarry, Cecil County, Maryland, USA
References
Dana 6:1067
Dana 7:II:255
Rocks & Min.: 17:340.
 
and/or  
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