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Pyrolusite from
Case Quarries, Portland, Middlesex Co., Connecticut, USA

Classification
Species:Pyrolusite
Comments:No pyrolusite dendrite or staining in a granite pegmatite in the world has been verified as pyrolusite. The name was a mistake in the nineteenth century which has been widely publicized.
Confirmation
Validity:Erroneously Reported
References
References:Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Case Quarries, Portland, Middlesex Co., Connecticut, USA
Nearest other occurrences of Pyrolusite
8.2km (5.1 miles) A White Rock District (White Rocks District), Middletown, Middlesex Co., Connecticut, USA
11.1km (6.9 miles) B New Britain, Hartford Co., Connecticut, USA
74.0km (46.0 miles) C Loudville Lead Mines (Manhan Lead-Silver Mine; Southampton Lead Mine; Northampton Lead Mine), Easthampton, Hampshire Co., Massachusetts, USA
82.6km (51.3 miles) D Salisbury Mine (Old Hill Mine; Ore Hill Mine), Salisbury District, Salisbury, Litchfield Co., Connecticut, USA
84.2km (52.3 miles) E Scoville Mine, Salisbury District, Salisbury, Litchfield Co., Connecticut, USA
90.4km (56.2 miles) F Interstate 84 road cuts, Brewster, Southeast Township, Putnam Co., New York, USA
98.9km (61.4 miles) G Conklin Quarry, Lime Rock, Lincoln, Providence Co., Rhode Island, USA
100.4km (62.4 miles) H Baylis Quarry (Bayliss Quarry), Bedford, Westchester Co., New York, USA
100.4km (62.4 miles) I Bedford, Westchester Co., New York, USA
101.2km (62.9 miles) J Betts Manganese Mines (Anson Betts Mine; Plainfield Manganese Mines), Plainfield, Hampshire Co., Massachusetts, USA
102.1km (63.4 miles) K Iron Mine Hill quarry, Cumberland, Providence Co., Rhode Island, USA
105.4km (65.5 miles) L Grants Mills, Cumberland, Providence Co., Rhode Island, USA
118.7km (73.7 miles) M Ossining (Sing Sing), Westchester Co., New York, USA
119.9km (74.5 miles) N Lake Street Quarry, Harrison, Westchester Co., New York, USA
144.7km (89.9 miles) O Interstate 95 and George Washington Bridge Lower Level roadcut, Fort Lee, Bergen Co., New Jersey, USA
153.5km (95.4 miles) P Prospect Park Quarry (Sowerbutt Quarry; Vandermade Quarry; Warren Brothers Quarry), Prospect Park, Passaic Co., New Jersey, USA
157.4km (97.8 miles) Q Lower New Street quarry, Paterson, Passaic Co., New Jersey, USA
157.4km (97.8 miles) R Upper New Street Quarry (Burger's Quarry), Paterson, Passaic Co., New Jersey, USA
157.6km (97.9 miles) S Riverside Quarry, Totowa, Passaic Co., New Jersey, USA
158.5km (98.5 miles) T Laurel Hill (Snake Hill; Penitentiary Quarry), Secaucus, Hudson Co., New Jersey, USA
159.8km (99.3 miles) U Francisco Brothers Quarry (Francisco Quarry), Great Notch, Little Falls Township, Passaic Co., New Jersey, USA
184.2km (114.5 miles) V Scrub Oak Mine (Replogle Mine), Mine Hill Borough, Morris Co., New Jersey, USA
201.7km (125.3 miles) W New Brunswick, Middlesex Co., New Jersey, USA
202.6km (125.9 miles) X Chimney Rock Quarry (Houdaille Industries Quarry; The Bound Brook Quarry; Stavola Industries Quarry), Bridgewater Township, Somerset Co., New Jersey, USA
Mineral and/or Locality  
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