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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Stilbite Subgroup from
Long Hill Quarry, Haddam, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Long Hill Quarry, Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:920228
Long-form Identifier:1:3:920228:3
GUID (UUID V4):0
Nearest other occurrences of Stilbite Subgroup
0.2km (0.1 miles) ⓘNemo's Quarry, Haddam, Middlesex County, Connecticut, USA
0.3km (0.2 miles) ⓘGulf Quarry, Haddam, Middlesex County, Connecticut, USA
1.3km (0.8 miles) ⓘArnold Granite Quarry (General Brainerd Quarry; Great Hill Quarry; Hazelton Quarry; Haddam Quarry; Brookes Quarry), Haddam, Middlesex County, Connecticut, USA
2.5km (1.6 miles) ⓘConnecticut Yankee atomic power plant, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
4.3km (2.7 miles) ⓘState Route 9 and State Route 81 Interchange, Higganum, Haddam, Middlesex County, Connecticut, USA
9.1km (5.7 miles) ⓘHadlyme, Lyme, New London County, Connecticut, USA
16.3km (10.1 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
18.8km (11.7 miles) ⓘReed's Gap Quarry (New Haven Trap Rock quarry; Tilcon Durham quarry), Durham, Middlesex County, Connecticut, USA
21.4km (13.3 miles) ⓘState Route 2 roadcut, Marlborough, Hartford County, Connecticut, USA
27.4km (17.0 miles) ⓘNorth Branford Quarry, North Branford, New Haven County, Connecticut, USA
References
Williams, Horace S. (circa 1945): Article for New York Society of Mineralogists. Brainerd Public Library, Haddam, Connecticut.
 
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