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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Laumontite from
French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA


Locality type:Mine
Classification
Species:Laumontite
Formula:CaAl2Si4O12 · 4H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Laumontite data
Locality Data:Click here to view French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:6817
Long-form Identifier:1:3:6817:8
GUID (UUID V4):0
Nearest other occurrences of Laumontite
11.1km (6.9 miles) ⓘH&K Birdsboro Materials Quarry (Dyer Trap Rock Quarry; Hay Creek Trap Rock Quarry), Hay Creek, Birdsboro, Berks County, Pennsylvania, USA
13.9km (8.7 miles) ⓘGrace Mine, Morgantown, Berks County, Pennsylvania, USA
15.3km (9.5 miles) ⓘDyer Quarry, Gibraltar, Birdsboro, Berks County, Pennsylvania, USA
22.1km (13.8 miles) ⓘSilver Hill Quarry, Bowmansville, Brecknock Township, Lancaster County, Pennsylvania, USA
39.5km (24.5 miles) ⓘLenni, Middletown Township, Delaware County, Pennsylvania, USA
44.8km (27.8 miles) ⓘWissahickon Valley, Philadelphia, Philadelphia County, Pennsylvania, USA
48.5km (30.1 miles) ⓘBrandywine Quarry (Hubbard Quarry), Wilmington, New Castle County, Delaware, USA
48.6km (30.2 miles) ⓘFalls of Schuylkill, Fairmount Park, Philadelphia, Philadelphia County, Pennsylvania, USA
48.8km (30.3 miles) ⓘMcKinney's Quarry, Rittenhouse Lane, Philadelphia, Philadelphia County, Pennsylvania, USA
58.7km (36.5 miles) ⓘCornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA
References
Sloto, Ronald A., Dickinson, Lana L. (1994) Famous Mineral Localities: The French Creek Mine, St. Peters, Chester County, Pennsylvania. The Mineralogical Record, 25 (2) 105-120
 
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