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Heulandite from
O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Southbury, New Haven Co., Connecticut, USA

Locality type:Quarry
Classification
Species:'Heulandite' (not an IMA approved species)
Comments:Late forming crystals to 2 cm perched on quartz or prehnite with other zeolites and apophyllite.
Habit:coffin-shaped prisms
Colour:white to almond
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
References
References:Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 407; Garabedian, James A. (1998), Secondary Mineralization of Half-Moon Vesicles in the Mesozoic Basalt of the O&G#2 Quarry, Woodbury, Connecticut. University of Connecticut Master of Science Thesis.
Associated Minerals Based on Photo Data:
Chabazite-Ca3 photos of Heulandite associated with Chabazite-Ca at this locality.
Anhydrite3 photos of Heulandite associated with Anhydrite at this locality.
Chalcedony3 photos of Heulandite associated with Chalcedony at this locality.
Pyrite2 photos of Heulandite associated with Pyrite at this locality.
Data
Mineral Data:Click here to view Heulandite data
Locality Data:Click here to view O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Southbury, New Haven Co., Connecticut, USA
Photo GalleryView Gallery (2 photos)
Nearest other occurrences of Heulandite
1.7km (1.0 miles) Nonnewaug River Industrial Park, Woodbury, Litchfield Co., Connecticut, USA
3.6km (2.2 miles) O & G Woodbury Quarry (Orenaug Quarry; O & G No. 1 Quarry), Orenaug Hills, Woodbury, Litchfield Co., Connecticut, USA
15.8km (9.8 miles) State Route 8 exit 37, Watertown, Litchfield Co., Connecticut, USA
16.7km (10.4 miles) Blue Stone Quarry, Waterbury, New Haven Co., Connecticut, USA
17.8km (11.1 miles) New England Materials quarry, Monroe, Fairfield County, Connecticut, USA
18.6km (11.5 miles) Waterbury Road quarry, Thomaston, Litchfield Co., Connecticut, USA
19.3km (12.0 miles) Reynolds Bridge, Thomaston, Litchfield Co., Connecticut, USA
21.5km (13.3 miles) Thomaston, Litchfield Co., Connecticut, USA
23.0km (14.3 miles) North Street mall, Danbury, Fairfield County, Connecticut, USA
23.8km (14.8 miles) Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield Co., Connecticut, USA
 
Mineral and/or Locality  
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