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Cetineite: (K,Na)3+x(Sb2O3)3(Sb2S3)(OH)x·(2.8-x)(H2O) Valentinite: Sb2O3
Comments: Orange-reddish acicular crystals of cetineite with white valentinite. Location: Cetine di Cotorniano mine (Cetine mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag