Description
Double terminated, gypsum var. selenite crystal cluster with fluorescent and phosphorescent hourglass with ultraviolet light.
Size: 46 x 42 x 25 mm. 36 grams.
Locale: Willow Creek, Nanton, Alberta, Canada
Fluorescent and phosphorescent (there is a glow that remains briefly after the UV light is removed) with long wave, mid wave and short-wave ultraviolet light.