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This specimen shows numerous lustrous, parallel-growing cylindrite crystals (Pb₃Sn₄FeSb₂S₁₄). It is accompanied by lighter gray acicular of incaite, a tin-rich Sn(II) franckeite variety (Pb,Ag)₄Sn₄FeSb₂S₁₅, which grow interlaced in the cylindrite. It is from the type locality for both species.