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Acanthite: Ag2S
Comments: Pseudo cubic acanthite crystals on matrix. Location: Rayas mine, Guanajuato, Mexico. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Acanthite: Ag2S Argentite: 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