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Heulandite-Ca from
Sky Ridge railroad cut, Hawleyville, Newtown, Fairfield County, Connecticut, USA

Formula:(Ca,Na)5(Si27Al9)O72 · 26H2O
Comments:Reference provides only a list of minerals with no details.
References:Januzzi, Ronald. (1976), Mineral Localities of Connecticut and Southeastern New York State. Mineralogical Press, Danbury, Connecticut.
Mineral Data:Click here to view Heulandite-Ca data
Locality Data:Click here to view Sky Ridge railroad cut, Hawleyville, Newtown, Fairfield County, Connecticut, USA
Nearest other occurrences of Heulandite-Ca
4.0km (2.5 miles) U. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
5.8km (3.6 miles) Interstate 84 road cuts (Route 6A bypass), Newtown, Fairfield County, Connecticut, USA
15.4km (9.6 miles) O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Southbury, New Haven Co., Connecticut, USA
18.5km (11.5 miles) Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
30.2km (18.8 miles) Waterbury, New Haven Co., Connecticut, USA
32.1km (20.0 miles) Blue Stone Quarry, Waterbury, New Haven Co., Connecticut, USA
38.7km (24.1 miles) Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield Co., Connecticut, USA
51.2km (31.8 miles) Ossining (Sing Sing), Westchester Co., New York, USA
62.9km (39.1 miles) Balf Quarry, Newington, Hartford Co., Connecticut, USA
87.0km (54.1 miles) Prospect Park Quarry (Sowerbutt Quarry; Vandermade Quarry; Warren Brothers Quarry), Prospect Park, Passaic Co., New Jersey, USA
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