Seth and Lisa Rosen

Seth and Lisa Rosen

Company Management

In 2012, Donald Clark retired and passed along stewardship of the IGS to Seth and Lisa Rosen. Seth and Lisa were longtime members of the IGS. Seth is a gem collector and active Internet entrepreneur, who had already spent a great deal of time in the custom jewelry business. He founded CustomMade, the world’s largest online custom jeweler and also operates The Ganoksin Project, a technical resource website for bench jewelers and jewelry manufacturers. Seth and Lisa felt strongly that the IGS needed to remain a cost-effective, accurate, and comprehensive resource for all those interested in gemology. IGS is our passion, and it is a family business.

Articles by Seth and Lisa Rosen

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