underthescopeminerals:Dufrénite Locality:Les Montmins Mine (Ste Barbe vein), Échassières, Ébreuil, A
underthescopeminerals:Dufrénite Locality:Les Montmins Mine (Ste Barbe vein), Échassières, Ébreuil, Allier, Auvergne, FranceDufrénite (could also be natrodufrénite) black balls with a velvet-like aspect.Jean-Marc Johannet’s Photo -- source link