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
Government pit, Albany, Carroll County, New Hampshire, USA


Locality type:Pit
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 Government pit, Albany, Carroll County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:31994
Long-form Identifier:1:3:31994:4
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.4km (0.8 miles) ⓘLovejoy Gravel pits, Conway, Carroll County, New Hampshire, USA
5.6km (3.5 miles) ⓘRedstone "Red Granite" quarry, Redstone, Conway, Carroll County, New Hampshire, USA
5.9km (3.7 miles) ⓘRedstone "Green Granite" quarry, Redstone, Conway, Carroll County, New Hampshire, USA
6.0km (3.8 miles) ⓘNorth Moat Mountain localities, Bartlett, Carroll County, New Hampshire, USA
14.7km (9.1 miles) ⓘIron Mountain Mines, Iron Mountain, Bartlett, Carroll County, New Hampshire, USA
14.8km (9.2 miles) ⓘSwan's Falls locality, Fryeburg, Oxford County, Maine, USA
16.1km (10.0 miles) ⓘJockey Cap Hill Garnet locality, Fryeburg, Oxford County, Maine, USA
16.1km (10.0 miles) ⓘJackson tin mines, Jackson, Carroll County, New Hampshire, USA
16.2km (10.1 miles) ⓘJackson Falls, Jackson, Carroll County, New Hampshire, USA
16.5km (10.2 miles) ⓘBirch Hill, Albany, Carroll County, New Hampshire, USA
References
Smith, Arthur E. (2005) New Hampshire mineral locality index. Rocks & Minerals, 80 (4) 242-261 doi:10.3200/rmin.80.4.242-261
 
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