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Devilline: CaCu4(SO4)2(OH)6·3(H2O)
Comments: Laminar crystals of blue devilline on matrix.. Location: Spania Dolina (ex-Herrengrund) Banská Bystrica Slovak Republic. Scale: Specimen size: 6.9 x 3.3 x 5.7 cm. © Fabre Minerals
Devilline: CaCu4(SO4)2(OH)6·3(H2O) Malachite: Cu2(CO3)(OH)2
Comments: Blue crystals of devilline on green, botryoidal malachite. Location: Spania Dolina (Herrengrund), Slovakia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals