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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Prehnite from
Hampden quarry, West Springfield, Hampden County, Massachusetts, USA


03599810017362117009007.jpg
Prehnite

Hampden quarry, West Springfield, Hampden County, Massachusetts, USA
03599810017362117009007.jpg
Prehnite

Hampden quarry, West Springfield, Hampden County, Massachusetts, USA
03070600017362117018059.jpg
Prehnite

Hampden quarry, West Springfield, Hampden County, Massachusetts, USA
Locality type:Quarry
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Datolite2
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Hampden quarry, West Springfield, Hampden County, Massachusetts, USA
Data Identifiers
Mindat Occurrence Record ID:38869
Long-form Identifier:1:3:38869:8
GUID (UUID V4):0
Nearest other occurrences of Prehnite
1.3km (0.8 miles) ⓘLane & Son traprock quarries (Lane's Quarry), Westfield, Hampden County, Massachusetts, USA
14.2km (8.8 miles) ⓘMount Tom Quarry, Mount Tom, Holyoke, Hampden County, Massachusetts, USA
21.1km (13.1 miles) ⓘState Route 20 road cut, East Granby, Hartford County, Connecticut, USA
22.0km (13.7 miles) ⓘRoncari Quarry, East Granby, Hartford County, Connecticut, USA
23.2km (14.4 miles) ⓘNotch Quarry (Lane Quarry; Amherst Quarry; Round Mountain Quarry), Amherst, Hampshire County, Massachusetts, USA
26.3km (16.3 miles) ⓘTariffville Gorge, Bloomfield, Hartford County, Connecticut, USA
29.5km (18.3 miles) ⓘMonson quarries (Flynt quarries), Monson, Hampden County, Massachusetts, USA
34.1km (21.2 miles) ⓘTalcott Mountain (King Phillip's Cave), Simsbury, Hartford County, Connecticut, USA
35.3km (21.9 miles) ⓘPelham Granite quarry (Ward Quarry; Valley Quarry), Pelham, Hampshire County, Massachusetts, USA
39.0km (24.2 miles) ⓘTalcott Mountain, Avon, Hartford County, Connecticut, USA
References
 
and/or  
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