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
Redstone "Green Granite" quarry, Redstone, Conway, Carroll County, New Hampshire, USA


Locality type:Quarry
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:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Redstone "Green Granite" quarry, Redstone, Conway, Carroll County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:31920
Long-form Identifier:1:3:31920:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.1km (0.7 miles) ⓘRedstone "Red Granite" quarry, Redstone, Conway, Carroll County, New Hampshire, USA
5.3km (3.3 miles) ⓘLovejoy Gravel pits, Conway, Carroll County, New Hampshire, USA
5.9km (3.7 miles) ⓘGovernment pit, Albany, Carroll County, New Hampshire, USA
9.3km (5.8 miles) ⓘSwan's Falls locality, Fryeburg, Oxford County, Maine, USA
9.4km (5.8 miles) ⓘNorth Moat Mountain localities, Bartlett, Carroll County, New Hampshire, USA
10.9km (6.8 miles) ⓘJockey Cap Hill Garnet locality, Fryeburg, Oxford County, Maine, USA
14.1km (8.7 miles) ⓘJackson tin mines, Jackson, Carroll County, New Hampshire, USA
14.7km (9.2 miles) ⓘJackson Falls, Jackson, Carroll County, New Hampshire, USA
15.2km (9.4 miles) ⓘIron Mountain Mines, Iron Mountain, Bartlett, Carroll County, New Hampshire, USA
18.0km (11.2 miles) ⓘEast Fryeburg Quartz locality, Fryeburg, Oxford County, Maine, USA
References
 
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