Visitors to the Harvard Museum of Natural History are dazzled by the Mineral Gallery’s beautiful specimens, yet the gallery displays only a fraction of the entire collection.

While each of the collection’s 300,000+ specimens has great scientific value, a subset also has significant commercial value. Join Curator Raquel Alonso-Perez for a virtual behind the-scenes visit to view specimens that, for security reasons, are not typically on display. You’ll see a rare opal in matrix from Mexico, tourmalines from the first pegmatitic discovery in the U.S., and crystalline gold, among...