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Gilalite: Cu5Si6O17·7(H2O)
Comments: Green spherical crystals of gilalite to 0.3mm in grape-like bunches. Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Comments: Striated, prismatic pale greenish yellow crystal of gilalite. Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals