Biotite : K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mindat locality:
Collected by:
Photo added to mindat.org
“Several adjoining stacked books of biotite, specimen 10.5cm high, collected 2010”
Bill Bunn - 27th August 2010
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