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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Calcite from
Old lead mine, Brookfield, Fairfield County, Connecticut, USA


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Comments:Calcite of the host Stockbridge Marble.
Habit:massive
Colour:white
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Abundance at site:Extremely common
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Sphalerite1
Galena1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Old lead mine, Brookfield, Fairfield County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:820644
Long-form Identifier:1:3:820644:2
GUID (UUID V4):0
Nearest other occurrences of Calcite
2.0km (1.2 miles) ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
2.1km (1.3 miles) ⓘU. S. Route 7 Expressway (Brookfield Bypass), Brookfield, Fairfield County, Connecticut, USA
4.4km (2.7 miles) ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA
5.9km (3.7 miles) ⓘSky Ridge railroad cut, Hawleyville, Newtown, Fairfield County, Connecticut, USA
7.4km (4.6 miles) ⓘNorth Street mall, Danbury, Fairfield County, Connecticut, USA
7.9km (4.9 miles) ⓘShelter Rock Road/Plumtrees Road intersection, Danbury, Fairfield County, Connecticut, USA
10.9km (6.8 miles) ⓘWestern Connecticut State University, Danbury, Fairfield County, Connecticut, USA
11.0km (6.9 miles) ⓘInterstate 84 road cuts (Route 6A bypass), Newtown, Fairfield County, Connecticut, USA
11.2km (7.0 miles) ⓘSandy Hook gold mine (Blackwell's mine), Sandy Hook, Newtown, Fairfield County, Connecticut, USA
12.6km (7.8 miles) ⓘRoxbury Iron Mine, Mine Hill, Roxbury, Litchfield County, Connecticut, USA
References
Shepard, Charles Upham (1837) A Report on the Geological Survey of Connecticut. Geological Survey of Connecticut.
 
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