Chemical Formula: Al3(PO4)2(OH,F)3.5(H2O)

Chemical Name: Hydrated Aluminium Phosphate Hydroxide

Mineral Class: Phosphate

Mineral Notes: Wavellite is a mineral that demonstrates the classic botryoidal crystal habit. It produces a unique effect when the globules are imbedded in rock and then fractured. The result is a radial cluster which reflects light to produce a sparkling pinwheel effect. 

Description: Seven spherical clusters of brown Wavellite upon a grey marble-like matrix. Three of the clusters are fused together and each has the full botryoidal form. To one side is a formation of two intergrown clusters, but as growth of these has been arrested, the pin-wheel effect is fully apparent. The specimen has a very bright pearly luster. 

Location: Rotlaufchen Mine, Waldgirmes, Germany.