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Eugenite: Ag9Hg2
Comments: Brassy, silvery eugenite alteration of leaf silver to 4mm. Location: Elisa de Bordos mine, Copiapó, Atacama Province, Chile. Scale: Picture size 1 cm. © Tom Loomis / Dakota Matrix
Comments: Metallic, silvery eugenite. Location: Copiapó, Atacama, Chile. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag