Schorl NaFe2+3Al6(BO3)3Si6O18(OH)4 with Quartz and Pyrite, Champion Mine, Marquette Co., Michigan
Schorl NaFe2+3Al6(BO3)3Si6O18(OH)4 with Quartz and Pyrite, Champion Mine, Marquette Co., Michigan
Schorl NaFe2+3Al6(BO3)3Si6O18(OH)4 in Schist, Hemlo, Bombay Township, Thunder Bay District, Ontario
Schorl NaFe2+3Al6(BO3)3Si6O18(OH)4 Marquette Co., Michigan
Schorl NaFe2+3Al6(BO3)3Si6O18(OH)4 with Biotite
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