Vein mineralization hosted by NW-trending joints at Tombuie near Loch Tay, Central Grampians contains base metal sulphides with Au, Bi, Ag and Te bearing phases associated with relatively late stage galena-dominated mineralization. Minerals present include mercurian electrum, tetradymite, altaite, rucklidegeite, hessite and argentian tetrahedrite. The mineralization is similar to that at Calliachar–Urlar and other mineralized localities in the region that form a small metallogenic province partially defined by a Bi stream sediment anomaly.

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