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
Swan's Falls locality, Fryeburg, Oxford County, Maine, USA


Locality type:Occurrence
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 Swan's Falls locality, Fryeburg, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:33603
Long-form Identifier:1:3:33603:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.4km (1.5 miles) ⓘJockey Cap Hill Garnet locality, Fryeburg, Oxford County, Maine, USA
8.8km (5.4 miles) ⓘEast Fryeburg Quartz locality, Fryeburg, Oxford County, Maine, USA
9.2km (5.7 miles) ⓘRedstone "Red Granite" quarry, Redstone, Conway, Carroll County, New Hampshire, USA
9.3km (5.8 miles) ⓘRedstone "Green Granite" quarry, Redstone, Conway, Carroll County, New Hampshire, USA
13.9km (8.6 miles) ⓘLovejoy Gravel pits, Conway, Carroll County, New Hampshire, USA
14.8km (9.2 miles) ⓘGovernment pit, Albany, Carroll County, New Hampshire, USA
18.6km (11.5 miles) ⓘNorth Moat Mountain localities, Bartlett, Carroll County, New Hampshire, USA
18.8km (11.7 miles) ⓘJackson tin mines, Jackson, Carroll County, New Hampshire, USA
20.0km (12.4 miles) ⓘPine Hill Chrysoberyl locality, Lovell, Oxford County, Maine, USA
20.1km (12.5 miles) ⓘJackson Falls, Jackson, Carroll County, New Hampshire, USA
References
 
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