As a gift for rock and mineral enthusiasts, this product would be sold at academic meetings such as the American Geophysical Union conference, which regularly sees over 25,000 attendees, the Geological Society of America conference, and more.
Rock, mineral, and gem shows, such as the Tucson Gem and Mineral show, would expand the audience to casual enthusiasts.
Gift shops at natural history museums and geologically-oriented state and national parks, such as Death Valley, Big Bend, Arches, and Grand Canyon, would also carry this product as an elegant gift or souvenir.