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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Cryptomelane from
Berry-Havey Quarry, Poland, Androscoggin County, Maine, USA


Locality type:Quarry
Classification
Species:Cryptomelane
Formula:K(Mn74+Mn3+)O16
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cryptomelane data
Locality Data:Click here to view Berry-Havey Quarry, Poland, Androscoggin County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:30271
Long-form Identifier:1:3:30271:3
GUID (UUID V4):0
Nearest other occurrences of Cryptomelane
17.3km (10.7 miles) ⓘMount Rubellite Quarries, Mount Rubellite, Hebron, Oxford County, Maine, USA
36.0km (22.4 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
46.8km (29.1 miles) ⓘBumpus Quarry, Albany, Oxford County, Maine, USA
49.5km (30.8 miles) ⓘSongo Pond Quarry (Kimball Ledge Quarry), Albany, Oxford County, Maine, USA
54.9km (34.1 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
62.3km (38.7 miles) ⓘDunton Gem Quarry, Newry, Oxford County, Maine, USA
62.4km (38.8 miles) ⓘBell pit, Newry, Oxford County, Maine, USA
62.5km (38.8 miles) ⓘCrooker Gem Pegmatite Quarries, Newry, Oxford County, Maine, USA
62.5km (38.8 miles) ⓘNevel Quarry, Newry, Oxford County, Maine, USA
References
King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey.
 
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