With two gemology students: Tracy Lindwall (USA) and Jazmin Amira Weissgarber Crespo (Germany) we decided to have a week end field expedition to the SAP sapphire mine in Kanchanaburi. The purpose of the field expedition was to get an update about sapphire mining around Bo Phloi in Kanchanaburi and for Tracy Lindwall to advance on her personal project regarding "conservation gemology".