SG Heritage Dictionary

Wavellite [Noun] Webster's Dictionary 1828

A mineral, a phosphate or sub-phosphate of alumin; commonly found in crystals, which usually adhere and radiate, forming hemispherical or globular concretions, from a very small size to an inch in diameter. The form of the crystal is usually that of a rhombic prism with dihedral terminations.

Wavellite [Noun] Webster's Dictionary 1913

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