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Arsenogoyazite: (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5·(H2O)
Comments: Clear, white micro (<0.25mm) rhombohedral arsenogoyazite crystals. Location: Clara mine, Schwarzwald, Germany. Scale: Picture size 0.5 cm. © Tom Loomis / Dakota Matrix
Arsenogoyazite: (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5·(H2O) Olivenite: Cu2AsO4(OH)
Comments: White micro-botryoids of arsenogoyazite with light green acicular crystal sprays of olivenite and dark green malachite on brown limonite. Location: Centennial Eureka Mine, Juab County, Utah. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species