PANGONIA, in natural history, the name of a genus of crystals, consisting of such as are composed of many angles. The word is derived from pan numerous, and gonia an angle or bending. The bodies of this genus are single-pointed or imperfect crystals, composed of dodecangular or twelve-planed columns, terminated by twelve-planed pyramids, and the whole body therefore made up of twenty-four planes. Of this genus there are only three known species.