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
Dennis Hill locality (Litchfield sodalite locality), Litchfield, Kennebec County, Maine, USA


06658510017362861256252.jpg
Annite

Dennis Hill locality, Litchfield, Kennebec County, Maine, USA
06658510017362861256252.jpg
Annite

Dennis Hill locality, Litchfield, Kennebec County, Maine, USA
01777420017272013869822.jpg
Annite

Dennis Hill locality, Litchfield, Kennebec County, Maine, USA
Locality type:Deposit
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:Confirmed
Confirmation Methods:Optical Analysis
Associated Minerals Based on Photo Data:
Cancrinite3
Albite3
Nepheline1
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Dennis Hill locality (Litchfield sodalite locality), Litchfield, Kennebec County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:854885
Long-form Identifier:1:3:854885:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
10.5km (6.5 miles) ⓘIron Hill Mine (Iron Hill), Gardiner, Kennebec County, Maine, USA
14.8km (9.2 miles) ⓘSabbatus Mountain, Wales, Androscoggin County, Maine, USA
18.8km (11.7 miles) ⓘCoombs Quarries, Bowdoin, Sagadahoc County, Maine, USA
23.7km (14.7 miles) ⓘAdderton Prospect, Bowdoinham, Sagadahoc County, Maine, USA
25.2km (15.6 miles) ⓘHavey #1 & #2 Quarries, Topsham, Sagadahoc County, Maine, USA
26.0km (16.2 miles) ⓘTrenton Quarry, Topsham, Sagadahoc County, Maine, USA
26.9km (16.7 miles) ⓘAlfred Plourde Parkway Quarry, Lewiston, Androscoggin County, Maine, USA
27.0km (16.8 miles) ⓘSquare Pit (Consolidated #4 Quarry), Topsham, Sagadahoc County, Maine, USA
27.0km (16.8 miles) ⓘCity quarry, Lewiston, Androscoggin County, Maine, USA
27.1km (16.8 miles) ⓘWilliam Willes #1 Quarry, Topsham, Sagadahoc County, Maine, USA
References
Frank W. Clarke
 
and/or  
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