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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Biotite from
Stonetown, Ringwood, Passaic County, New Jersey, USA


Locality type:Village
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Comments:Occurs in a mica-diorite body.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Stonetown, Ringwood, Passaic County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:70753
Long-form Identifier:1:3:70753:8
GUID (UUID V4):0
Nearest other occurrences of Biotite
4.0km (2.5 miles) ⓘKornerupine Group locality, Ringwood, Passaic County, New Jersey, USA
10.7km (6.7 miles) ⓘPompton Junction feldspar deposit, Pompton Lakes, Passaic County, New Jersey, USA
11.8km (7.3 miles) ⓘBehring Mine (Bering Mine), Sloatsburg, Town of Ramapo, Rockland County, New York, USA
12.3km (7.6 miles) ⓘUpper California Mine, Sterling Mines group, Sterling Lake, Town of Warwick, Orange County, New York, USA
12.9km (8.0 miles) ⓘMoorhead Mine (Morehead Mine), Sloatsburg, Town of Ramapo, Rockland County, New York, USA
13.0km (8.1 miles) ⓘLake Mine, Sterling Lake, Town of Warwick, Orange County, New York, USA
16.2km (10.1 miles) ⓘCopperas Mine, Copperas Mountain, Rockaway Township, Morris County, New Jersey, USA
20.9km (13.0 miles) ⓘMontville serpentine deposit, Montville Township, Morris County, New Jersey, USA
20.9km (13.0 miles) ⓘLake Valhalla Quarry (Gordon's Crystalline Limestone Quarry), Montville Township, Morris County, New Jersey, USA
21.3km (13.2 miles) ⓘPochuck Mountain, McAfee, Vernon Township, Sussex County, New Jersey, USA
References
NJ State Geol. Ann. Rpt. (1886):107-108.
 
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