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Tetrarooseveltite: BiAsO4
Comments: Light-yellow, earthy tetrarooseveltite. Location: Moldava, Teplice (Teplitz), Krusné Hory (Erzgebirge), Severoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 4.5 mm. © Thomas Witzke / Abraxas-Verlag