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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Gypsum from
Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA


08777310017272015147521.jpg
Gypsum, etc.

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
03504660017272100173709.jpg
Gypsum, etc.

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
09571190017272100189258.jpg
Gypsum

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
01631660017272100184145.jpg
Gypsum

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
04861630017368103851774.jpg
Gypsum, etc.

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
05678800017368103863255.jpg
Gypsum, etc.

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
04879770017368103882275.jpg
Gypsum

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
04747780017368103873059.jpg
Gypsum

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
08777310017272015147521.jpg
Gypsum, etc.

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
03504660017272100173709.jpg
Gypsum, etc.

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
09571190017272100189258.jpg
Gypsum

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
01631660017272100184145.jpg
Gypsum

Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
Locality type:Construction Site
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Comments:Rarely found in open fissures as etched, transparent cleavable masses associated with fluorite. Prismatic microcrystals
Habit:cleavable masses. Prismatic microcrystals
Colour:colorless
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Fluorite5
Albite4
Rosasite3
Chalcopyrite2
Clinochlore2
Quartz2
Calcite2
Goethite1
Native Sulphur1
Cuprite1
Azurite1
Bismutite1
Bismuthinite1
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
Photo GalleryView Gallery (8 photos)
Data Identifiers
Mindat Occurrence Record ID:347325
Long-form Identifier:1:3:347325:2
GUID (UUID V4):0
Nearest other occurrences of Gypsum
0.4km (0.2 miles) ⓘOld Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
0.5km (0.3 miles) ⓘState Route 111 road cuts, Long Hill, Trumbull, Fairfield County, Connecticut, USA
18.5km (11.5 miles) ⓘSky Ridge railroad cut, Hawleyville, Newtown, Fairfield County, Connecticut, USA
19.2km (12.0 miles) ⓘBarrett Brothers Quarry (D and J Quarry), Beacon Falls, New Haven County, Connecticut, USA
21.5km (13.3 miles) ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA
24.7km (15.4 miles) ⓘGreen's Farm locality (Roxbury garnet mine; Roxbury Falls garnet mine; Garnet Hill), Roxbury, Litchfield County, Connecticut, USA
24.8km (15.4 miles) ⓘO & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
30.6km (19.0 miles) ⓘCinque Quarry, East Haven, New Haven County, Connecticut, USA
34.4km (21.4 miles) ⓘProgress Lane construction site, Waterbury, New Haven County, Connecticut, USA
35.2km (21.9 miles) ⓘInterstate 84 road cuts, Town of Southeast, Putnam County, New York, USA
References
J. Zolan collection. Harold Moritz collection. David Busha collection.
 
and/or  
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