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
O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA


Locality type:Quarry
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:1012603
Long-form Identifier:1:3:1012603:3
GUID (UUID V4):0
Nearest other occurrences of Gypsum
7.3km (4.5 miles) ⓘGreen's Farm locality (Roxbury garnet mine; Roxbury Falls garnet mine; Garnet Hill), Roxbury, Litchfield County, Connecticut, USA
15.4km (9.6 miles) ⓘSky Ridge railroad cut, Hawleyville, Newtown, Fairfield County, Connecticut, USA
16.0km (9.9 miles) ⓘBarrett Brothers Quarry (D and J Quarry), Beacon Falls, New Haven County, Connecticut, USA
18.6km (11.5 miles) ⓘWaterbury Road quarry, Thomaston, Litchfield County, Connecticut, USA
18.9km (11.8 miles) ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA
20.3km (12.6 miles) ⓘProgress Lane construction site, Waterbury, New Haven County, Connecticut, USA
24.3km (15.1 miles) ⓘCheshire Traprock Quarry, Cheshire, New Haven County, Connecticut, USA
24.8km (15.4 miles) ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
25.0km (15.5 miles) ⓘOld Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
25.2km (15.7 miles) ⓘState Route 111 road cuts, Long Hill, Trumbull, Fairfield County, Connecticut, USA
References
Jack Pawlowski specimen
 
and/or  
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