Samples and collections are a fundamental component of Earth, planetary, and environmental sciences. Registration of samples with IGSN, a persistent, unique identifier system for samples allows to more easily share, discover, access, and reuse samples, and link digital data and publications to the physical objects and their archives. This meeting will provides an opportunity to learn about the IGSN and how to use it and participate in international initiatives that advance consistent representation and identification of samples on the internet.