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
Mase Mountain, Tierneys Corner, Jefferson Township, Morris County, New Jersey, USA


Locality type:Mountain
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Mase Mountain, Tierneys Corner, Jefferson Township, Morris County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:99463
Long-form Identifier:1:3:99463:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
4.1km (2.5 miles) ⓘAllen Mine, Rockaway Township, Morris County, New Jersey, USA
4.8km (3.0 miles) ⓘMount Hope Mines (Mt Hope Mines), Mount Hope, Rockaway Township, Morris County, New Jersey, USA
6.2km (3.9 miles) ⓘScrub Oaks Mine, Mine Hill, Morris County, New Jersey, USA
7.3km (4.5 miles) ⓘGove Mine [1], Mount Arlington, Morris County, New Jersey, USA
7.8km (4.8 miles) ⓘThomas Fanning's Quarry, Dover, Morris County, New Jersey, USA
8.5km (5.3 miles) ⓘUnnamed pegmatites, Wildcat Ridge Wildlife Management Area, Rockaway Township, Morris County, New Jersey, USA
9.8km (6.1 miles) ⓘBeach Glen Mines (Beach Glenn Mine), Hibernia, Rockaway Township, Morris County, New Jersey, USA
11.1km (6.9 miles) ⓘByram Crushed Stone Quarry (Tilcon Byram Quarry), Byram Township, Sussex County, New Jersey, USA
11.9km (7.4 miles) ⓘPanther Hill Granite Co. Quarry, Whitehall, Byram Township, Sussex County, New Jersey, USA
12.2km (7.6 miles) ⓘUlvöspinel Locality, Sparta Township, Sussex County, New Jersey, USA
References
Volkert, Richard A., 2009, Kornerupine: A Rare and Unusual Mineral in the New Jersey Highlands, The Picking Table, v. 50 (1): 20-21.
library.iem.ac.ru (1999) http://library.iem.ac.ru/can-min/vol33/cm6/young.html
 
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