WAVELLITE
n.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.
Wa "vel *lite, n. Etym: [After Dr. Wm. Wavel, the discoverer. ] (Min. )