Wavellite n. : A hydrous phosphate of alumina, occurring usually in hemispherical radiated forms varying in color from white to yellow, green, or black.

Example:


Taxonomy
Wavellite, free encyclopedia, mineral, phosphate mineral, fractures, search, yellowish-green, green and yellow, aggregates, striated, prisms, Dipyramidal, 101, hardness, Vitreous, resinous, Optical properties, Biaxial.

Defination from the web:
Wavellite is a phosphate mineral, normally translucent green. It is found in fractures in aluminous metamorphic rock, in hydrothermal regions and in phosphate rock deposits. ... Wavellite, Montgomery County, Arkansas. This article about a specific phosphate mineral is a stub. You can ...