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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Smithsonite from
Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA


Locality type:Road Cutting
Classification
Species:Smithsonite
Formula:ZnCO3
Formation:Secondary
Comments:Included in a list of species with no supporting data and a question mark. Presumably an alteration of sphalerite, but hydrozincite is much more common locally.
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Smithsonite data
Locality Data:Click here to view Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:657244
Long-form Identifier:1:3:657244:0
GUID (UUID V4):0
Nearest other occurrences of Smithsonite
38.0km (23.6 miles) ⓘOld lead mine, Brookfield, Fairfield County, Connecticut, USA
40.9km (25.4 miles) ⓘMiddletown lead mines (Middletown Mine), Middletown, Middlesex County, Connecticut, USA
45.0km (27.9 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
46.6km (29.0 miles) ⓘState Route 22 roadcut, Millerton, Town of North East (Northeast), Dutchess County, New York, USA
47.2km (29.3 miles) ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
70.6km (43.9 miles) ⓘLoudville Lead Mines (Manhan Lead-Silver Mine; Southampton Lead Mine; Northampton Lead Mine), Easthampton, Hampshire County, Massachusetts, USA
References
Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA.
 
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