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


Locality type:Road Cutting
Classification
Species:Pyrolusite
Formula:Mn4+O2
Comments:A black earthy mineral which has not been properly identified.
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:96378
Long-form Identifier:1:3:96378:1
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
30.8km (19.1 miles) ⓘRoebling Quarry, Upper Merryall, New Milford, Litchfield County, Connecticut, USA
31.5km (19.6 miles) ⓘKent Iron Mine (Limonite mine), Kent, Litchfield County, Connecticut, USA
38.8km (24.1 miles) ⓘSouth Glastonbury, Glastonbury, Hartford County, Connecticut, USA
39.4km (24.5 miles) ⓘHowe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
39.6km (24.6 miles) ⓘHusband Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
39.6km (24.6 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
39.8km (24.7 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
39.9km (24.8 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
40.2km (25.0 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
40.7km (25.3 miles) ⓘPfizer Company Marble Quarry, Canaan, North Canaan, Litchfield County, Connecticut, 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.
Segeler, Curt G., Molon, Joseph (1985) The Thomaston Dam Site Thomaston, Connecticut. Rocks & Minerals, 60 (3) 119-124 doi:10.1080/00357529.1985.11764386
 
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