Watch your students' eyes light up when they see this Geoscience Fluorescent Mineral Set! Organized into a compartmentalized box, the inside features 15 assorted, numbered, and keyed specimens inside, all sized at 1-1/2 x 1-1/2 inches. Expose each rock to either long-wave or short-wave ultraviolet light, and watch them fluoresce/illuminate! Number key and information sheet included.