Exquisite specimens from around the world The polished rocks, gemstones, and fossils in this advent calendar include geode, pyrite, rose quartz, red, black, and green jasper, agate, tiger's eye, brachiopods, black sea urchins, and more!24 Days of Treasure Hunt Each day before Christmas, kids will open a panel to discover a special rock, mineral, fossil, or gemstone! With this Christmas countdown calendar, kids can start collecting rocks they'll enjoy year-round, and it comes with a storage bag!Last Day: Dig Up a Special Crystal The final piece in the collection is a stunning rose quartz specimen, which kids will unearth from a mini digging brick. Includes a digging tool and brush, as well as a magnifying glass for a close-up look at all the pieces!A holiday gift to cherish for a lifetime Collecting rocks and minerals is a popular hobby, and this rock collecting set is the perfect way to inspire a lasting love of geology in kids, while also letting them learn about the fossils, rocks, and crystals within!HIGH-QUALITY EDUCATIONAL TOYS - National Geological takes pride in manufacturing the highest quality hands-on science toys, all backed by exceptional service and a commitment to your satisfaction.