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Burangaite: (Na,Ca)2(Fe++,Mg)2Al10(PO4)8(OH,O)12·4(H2O) Gatumbaite: CaAl2(PO4)2(OH)2·(H2O)
Comments: Small, blue burangaite crystals in beige gatumbaite. Location: Horrsjoberg, Torby, Värmland, Sweden. Scale: Micro-mount Size. © Sonke Stolze / Systematic Minerals