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Aleksite: PbBi2Te2S2 (?)
Comments: Gray, metallic aleskite grains in quartz with tellurobismuthite and Pb-bearing tetradymite.
Location: St. David's Mine, Bontddu, Dogellau, Gwynedd, Wales, UK.
Scale: Specimen Size 2.5x4.5 cm.
© Diederik Visser