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-Ca from
Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA


01679590017598634886857.jpg
Stilbite-Ca, etc.

Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
08674060017598634889010.jpg
Stilbite-Ca

Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
07271620017272019629220.jpg
Stilbite-Ca, etc.

Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
08674060017598634889010.jpg
Stilbite-Ca

Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
05447400017272019679953.jpg
Stilbite-Ca, etc.

Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
04145570017598581866573.jpg
Stilbite-Ca

Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
Locality type:Road Cutting
Classification
Species:Stilbite-Ca
Formula:NaCa4(Si27Al9)O72 · 28H2O
Comments:In 2018, two specimens were analyzed via SEM-EDS and were determined to be probably stilbite-Ca www.mindat.org/photo-492320.html (as opposed to stellerite) and possibly stellerite www.mindat.org/photo-768454.html, which cannot be visually differentiated.
Habit:tabular elongated or in wheat sheave crystal aggregates
Colour:tan, pale yellow to yellow-orange
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:SEM-EDS
Associated Minerals Based on Photo Data:
Fluorite1
Data
Mineral Data:Click here to view Stilbite-Ca data
Locality Data:Click here to view Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:13185
Long-form Identifier:1:3:13185:0
GUID (UUID V4):0
Nearest other occurrences of Stilbite-Ca
8.8km (5.4 miles) ⓘHancock Brook Dam, Plymouth, Litchfield County, Connecticut, USA
10.7km (6.7 miles) ⓘState Route 8 interchange 34 (formerly 37), Watertown, Litchfield County, Connecticut, USA
20.3km (12.6 miles) ⓘO & G Woodbury Traprock Quarry (Orenaug Quarry; O & G No. 1 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
23.8km (14.8 miles) ⓘO & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
31.1km (19.3 miles) ⓘBarrett Brothers Quarry (D and J Quarry), Beacon Falls, New Haven County, Connecticut, USA
36.2km (22.5 miles) ⓘInterstate 84 road cuts (Route 6A bypass), Newtown, Fairfield County, Connecticut, USA
38.6km (24.0 miles) ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
47.2km (29.3 miles) ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
68.8km (42.8 miles) ⓘState route 15 / US highway 7 interchange area, Norwalk, Fairfield County, Connecticut, USA
References
Moritz, Harold (n.d.) Personal Communication.
 
and/or  
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