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
Virginia Lake prospect, Stoneham, Oxford County, Maine, USA


Locality type:Prospect
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 Virginia Lake prospect, Stoneham, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:34147
Long-form Identifier:1:3:34147:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.9km (1.8 miles) ⓘHarding Hill prospects, Stoneham, Oxford County, Maine, USA
4.8km (3.0 miles) ⓘBeryllonite locality, Sugarloaf Mountain, Stoneham, Oxford County, Maine, USA
5.1km (3.2 miles) ⓘShirley Brook Topaz locality, Stoneham, Oxford County, Maine, USA
7.5km (4.6 miles) ⓘCole Quarry, Stoneham, Oxford County, Maine, USA
7.8km (4.9 miles) ⓘDouglass Road Metal Quarry, Albany, Oxford County, Maine, USA
7.9km (4.9 miles) ⓘPalmer Mountain locality, Stoneham, Oxford County, Maine, USA
8.0km (5.0 miles) ⓘBumpus Quarry, Albany, Oxford County, Maine, USA
8.2km (5.1 miles) ⓘDonahue Quarry (Donahue Prospect), Albany, Oxford County, Maine, USA
8.6km (5.3 miles) ⓘOrman McAllister Quarry, Lovell, Oxford County, Maine, USA
8.8km (5.5 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
References
 
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