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Helvite: Mn4Be3(SiO4)3S Rhodochrosite: MnCO3
Comments: Yellow crystals of helvite on quartz and pink rhodochrosite. Location: Galerie Elisabeth, Cavnic, Maramures, Romaina. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Helvite: Mn4Be3(SiO4)3S
Comments: Large (for the species), triangular yellowish creamy colored crystals of helvite on white, albite matrix. Location: Navegador mine, Conselheiro Pena, Minas Gerais, Brazil. Scale: Crystal size 0.7 x 0.7 cm. © Fabre Minerals