Provenance and Authenticity
Pledge to Our Customers: Authenticity, Provenance, Source
Authenticity is what separates a scientific specimen from an unidentified, anonymous rock. A specimen's identification, scientific value, and place in the historic record depend on knowing exactly where the material originated, whether it was legally collected, and how it will move from the collection point to our website.
Sources and Provenance
We source all of our scientific material from the private collections of active and inactive scientists and the estates of trusted historic scientific collections of explorers and researchers. Material of this caliber rarely reaches the collectors' market, and Jensan Scientifics / Sciencemall-USA maintains strict confidentiality regarding our premier sources—a trusted partnership that allows us to continue to bring these specimens directly to collectors, educators, museums, and research centers.
Chain of Custody
Our accompanying Certificate of Authenticity (COA) serves as our legal and professional guarantee of each specimen's authenticity and chain of custody, so you can display your specimen with total confidence. Where a specimen's origin carries legal or permit requirements, we confirm that the material was lawfully collected and lawfully transferred before we ever offer it.
About the Jensan Scientifics / Sciencemall-USA Collection
Our catalog is built specimen by specimen rather than by the lot. It ranges from deep-ocean drill core to the oldest rocks and the oldest life preserved in rocks on Earth, to volcanic, impact, and expedition material tied to specific moments in the history of science. Museums, planetariums, educational supply houses, university programs, feature film productions, and international lunar research facilities purchase material from our catalog. Since 1998 — nearly three decades — Jensan Scientifics / Sciencemall-USA has grown into a robust portal for collectors, teachers, academics, and researchers alike. Browse our diverse collection at your leisure and uncover the incredible details of the rocks that make up planet Earth.