Pyrrhotite, Quartz (Var: Rock Crystal), Actinolite (Var: Byssolite)

Pyrrhotite : Fe₇S₈, (-4M), also given as Fe_1-xS (x = 0 - 0.2), Quartz (Var: Rock Crystal) : , Actinolite (Var: Byssolite) : ☐Ca₂(Mg,Fe²⁺)₅(Si₈O₂₂)(OH)₂

Locality: St Gotthard basis tunnel (north section), NEAT Construction site, Amsteg, Reuss Valley, Uri, Switzerland

Tabular crystals to 1.8 cm across. Collected in 2004. Specimen size: 4.5 x 3 x 2.5 cm. P Haas photograph and collection (no. 23-125).

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Pyrrhotite, Quartz (Var: Rock Crystal), Actinolite (Var: Byssolite)

Pyrrhotite : Fe7S8, (-4M), also given as Fe1-xS (x = 0 - 0.2), Quartz (Var: Rock Crystal) : , Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2

Pyrrhotite : Fe₇S₈, (-4M), also given as Fe_1-xS (x = 0 - 0.2), Quartz (Var: Rock Crystal) : , Actinolite (Var: Byssolite) : ☐Ca₂(Mg,Fe²⁺)₅(Si₈O₂₂)(OH)₂