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Biotite from
Piper graphite mine (Piper black-lead mine), Northfield, Franklin County, Massachusetts, USA


Locality type:Mine
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 Piper graphite mine (Piper black-lead mine), Northfield, Franklin County, Massachusetts, USA
Data Identifiers
Mindat Occurrence Record ID:760944
Long-form Identifier:1:3:760944:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
8.9km (5.6 miles) ⓘOrange mica mine, Orange, Franklin County, Massachusetts, USA
22.3km (13.8 miles) ⓘSouth Royalston beryl locality (Clark locality), Royalston, Worcester County, Massachusetts, USA
23.1km (14.3 miles) ⓘReynolds Mine (Beryl Hill Mine), Royalston, Worcester County, Massachusetts, USA
24.9km (15.5 miles) ⓘWebb Granite Quarry, Fitzwilliam, Cheshire County, New Hampshire, USA
25.8km (16.0 miles) ⓘSilver White Granite Quarry, Fitzwilliam, Cheshire County, New Hampshire, USA
26.2km (16.3 miles) ⓘSnow Flake Granite Quarry, Fitzwilliam, Cheshire County, New Hampshire, USA
29.2km (18.2 miles) ⓘPelham Granite quarry (Ward Quarry; Valley Quarry), Pelham, Hampshire County, Massachusetts, USA
32.5km (20.2 miles) ⓘDummerston granite quarry, Dummerston, Windham County, Vermont, USA
32.9km (20.5 miles) ⓘPelham asbestos mine, Pelham, Hampshire County, Massachusetts, USA
34.4km (21.4 miles) ⓘMonadnock Mountain, Jaffrey, Cheshire County, New Hampshire, USA
References
Emerson, Benjamin K. (1895) A mineralogical lexicon of Franklin, Hampshire, and Hampden counties, Massachusetts. Bulletin 126. US Geological Survey doi:10.3133/b126
 
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