Terrific expanded collection allows a study in detail of the response of these minerals to the range of ultraviolet rays. 15 specimens approximately 1 l/2 by 1 l/2 inch. Grades 6-12. Also available with ten handheld long-wave blacklights (Short-wave not available). Need more blacklights? Purchase extra long-wave hand-held blacklights. Information on how to place your order by fax or by telephone.

Product Number SR2375