Schorl

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