A cluster of mostly translucent gypsum blades, radiating from a central point. Rendered light grey by unidentified inclusions. Bright blue white fluorescence under both longwave and shortwave. The most remarkable feature of this specimen is the very long visible phosphorescence caused by longwave UV; this phosphorescence is among the longest I have ever seen! A few small bruises, but overall condition is quite good, especially considering this mineral's softness and propensity to bruise and cleave. Ex Angie Cannon collection; her label accompanies the specimen.