This 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". Grades 6-12. Use with a Black Light. Information on how to place your order by fax or by telephone. Shipped directly from the manufacturer. Not available with rush shipping. Delivery time estimated at 10-14 days or less. Gift wrap not available. Product Number AM2375