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
Mooresfield Granite quarry, South Kingstown, Washington County, Rhode Island, 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:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Mooresfield Granite quarry, South Kingstown, Washington County, Rhode Island, USA
Data Identifiers
Mindat Occurrence Record ID:148393
Long-form Identifier:1:3:148393:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.3km (1.4 miles) ⓘKingston Hill, South Kingstown, Washington County, Rhode Island, USA
3.7km (2.3 miles) ⓘTower Hill, Narragansett, Washington County, Rhode Island, USA
4.5km (2.8 miles) ⓘWest Kingston, South Kingstown, Washington County, Rhode Island, USA
6.3km (3.9 miles) ⓘBonnet Shores, Narragansett, Washington County, Rhode Island, USA
6.7km (4.1 miles) ⓘStook Hill, Saunderstown, North Kingstown, Washington County, Rhode Island, USA
20.4km (12.7 miles) ⓘParadise quarry, Middletown, Newport County, Rhode Island, USA
20.9km (13.0 miles) ⓘCardi Quarry, Coventry, Kent County, Rhode Island, USA
26.3km (16.3 miles) ⓘBristol Ferry, Portsmouth, Newport County, Rhode Island, USA
27.9km (17.3 miles) ⓘRedstone Granite Quarry (Cherenzia Quarry), Westerly, Washington County, Rhode Island, USA
29.3km (18.2 miles) ⓘSmith Granite quarry, Westerly, Washington County, Rhode Island, USA
References
 
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