This program was visiting and studying in the exhibition of Gemstone on Monday, September 7th 2014 at XT Square, Yogyakarta. It was a national scale gemstone exhibition. A lot of gems explorer in Indonesia gathered in this exhibition to exhibit and sell their product. SEG UGM-SC‟s member were attend in this program to learn about gemstone. We discussed many things about gemstone with the collector. We discussed and learned about how to identify the gemstone, the genetic of gemstone, and so on. This program was followed by about 20 members.