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
Sunday Lake Garnet Occurrence, Buena Vista Mining District, King County, Washington, USA


Locality type:Lake
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 Sunday Lake Garnet Occurrence, Buena Vista Mining District, King County, Washington, USA
Data Identifiers
Mindat Occurrence Record ID:436292
Long-form Identifier:1:3:436292:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
6.5km (4.0 miles) ⓘRainy Mine, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
7.1km (4.4 miles) ⓘNorth Fork Copper Deposit, Buena Vista Mining District, King County, Washington, USA
20.7km (12.8 miles) ⓘBarclay Creek Skarn, Index Mining District, Snohomish County, Washington, USA
21.8km (13.6 miles) ⓘCondor-Hemlock Mine, Middle Fork of the Snoqualmie River, Snoqualmie Mining District, King County, Washington, USA
23.1km (14.3 miles) ⓘGunn Peak Prospect, Bitter Creek, Index Mining District, Snohomish County, Washington, USA
26.9km (16.7 miles) ⓘCarmack Mine, Snoqualmie Mining District, King County, Washington, USA
30.3km (18.8 miles) ⓘScout Patrol Peak, Hansen Creek area, Snoqualmie Mining District, King County, Washington, USA
32.1km (19.9 miles) ⓘSultan Canyon, Sultan Mining District, Snohomish County, Washington, USA
33.1km (20.6 miles) ⓘMineral Creek Mine (Durrwachter Mine; Liberty Lode Mine), Mineral Creek, Kittitas County, Washington, USA
42.8km (26.6 miles) ⓘSunrise Prospect, North Fork of the Sultan River, Sultan Mining District, Snohomish County, Washington, USA
References
Cannon, Bart (1975) Minerals of Washington. Cordilleran. 184 pp.p.39
 
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