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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Siderite from
Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA


03997110017363413078052.jpg
Siderite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
03997110017363413078052.jpg
Siderite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
08920950017272020121049.jpg
Siderite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
Locality type:Mine
Classification
Species:Siderite
Formula:FeCO3
Comments:Reported as brown spherical aggregates on biotite schist, and reddish-brown cleavages
Habit:spherical aggregates, cleavable masses
Colour:brown
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Brucite1
Quartz1
Data
Mineral Data:Click here to view Siderite data
Locality Data:Click here to view Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:100237
Long-form Identifier:1:3:100237:9
GUID (UUID V4):0
Nearest other occurrences of Siderite
30.5km (18.9 miles) ⓘRoxbury Iron Mine, Mine Hill, Roxbury, Litchfield County, Connecticut, USA
30.8km (19.2 miles) ⓘRockside Quarry, Mine Hill, Roxbury, Litchfield County, Connecticut, USA
35.7km (22.2 miles) ⓘLane's Mine (Lane's Lead and Silver Mine; Elm Street), Monroe, Fairfield County, Connecticut, USA
36.9km (22.9 miles) ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
37.1km (23.1 miles) ⓘCorporate Drive, Long Hill, Trumbull, Fairfield County, Connecticut, USA
37.3km (23.1 miles) ⓘOld Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
40.1km (24.9 miles) ⓘState Route 25 road cuts, Trumbull, Fairfield County, Connecticut, USA
46.7km (29.0 miles) ⓘArsenic and nickel mine (Nickel Mine Brook), Seymour, New Haven County, Connecticut, USA
49.2km (30.5 miles) ⓘGridley Mine, Amenia (Ameniaville), Dutchess County, New York, USA
49.4km (30.7 miles) ⓘAmenia Mine, Amenia (Ameniaville), Dutchess County, New York, USA
References
(Januzzi, 1966, 1989) (Trainer, 1939).
Jensen (1978) Minerals of New York State, pp.42-43
 
and/or  
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