A gemmy gypsum (variety selenite crystal), glassy and very well formed, as is typical for the locality. Fluorescent, displaying a bluish color under both longwave UV (blacklight) and shortwave UV. Phosphorescent; when illumination by longwave UV is stopped, the specimen continues to produce a visible glow for another second or two. Ex Kay Robertson; her labels accompany the specimen, which is in fine condition. Complete all around with not cleaves or points of contact; a floater.