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Gibbsite: Al(OH)3
Comments: Transparent to white, tabular-prismatic gibbsite crystals. Location: Saga Quarry, Langesundfjord, Oslo Region, Norway. Scale: Crystal size 1 mm. © John Veevaert
Gibbsite: Al(OH)3 Doyleite: Al(OH)3
Comments: Botryoidal spheres of doyleite growing along with its dimorph gibbsite. Analysis shows that doyleite dominates the mix. There are also minor canary yellow phlogopite crystals. Location: Baoshan, Yunnan, China. Scale: 8 x 6.5 x 1.9 cm. © Fabre Minerals