Seth and Lisa Rosen

Lisa Rosen

Company Management

In 2012, Donald Clark retired and passed along stewardship of the IGS to the Rosen family, who were longtime members of IGS. Lisa Rosen runs the day-to-day operation of IGS and  The Ganoksin Project, a technical resource website for bench jewelers and jewelry manufacturers.  Lisa strongly believes that IGS must remain a cost-effective, accurate, and comprehensive resource for all those interested in gemology. IGS is our passion, and it is a family business.