AMBLYGONITE

[am.blyg.o.nite] n [G Amblygonit, fr. Gk amblygonios obtuse-angled, fr. amblys blunt, dull + gonia angle--more at mollify, -gon] (ca. 1828): a mineral that consists of basic lithium aluminum phosphate commonly containing sodium and fluorine and occurs in white cleavable masses