What makes a gemstone unique among rocks? This presentation includes the geology of a gems formation and the gemology of how a gem is identified.  Hands-on activity stations at the end of the lecture teach the basics of gemstone identification. Presented by geologist, Sara Johnson, M.S. and gemologist, Sakina Bharani, G.G. Lecture/Activity for age 16 and up. Regular Museum Admission, Reservations Recommended.