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Argentite: Ag2S Acanthite: Ag2S
Comments: Dark metallic acanthite crystals up to 3 mm. Most of the crystals are a cubic habit, so the acanthite is pseudomorphing the original argentite.
Location: San Juan de Rayas Mine (Rayas Mine), Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico.
Scale: 18x12x12 mm.
© John Betts - Fine Minerals