"Wavellite is the most prominent phosphate mineral at Phosphate Hill. It is best developed in the phosphorite, where it occurs in seams, veinlets and cavities. Spherical aggregates of tightly packed acicular wavellite crystals may be up to 9mm across. The crystals are flattened in section and show wedge-shaped terminations. Isolated, open radiating sprays are uncommon and the aggregates are usually intergrown to form globular crusts. When broken these show the typical structure of fibrous radiating crystals forming shallow discs or low-angle cones. Wavellite crystals are usually colourless, but the crusts may be greyish white or pale green. Blocky water-clear wavellite crystals up to 0.5mm long occur with cacoxenite and strengite-variscite. Wavellite is occasionally pseudomorphed by pale blue-green turquoise and may be intimately mixed with variscite in thin seams in chert."
Phosphate Hill, Mansfield, Mansfield Shire, Victoria, Australia