Reveal a new gem daily As Christmas approaches, every day in December, kids can unwrap a gorgeous new gem to add to their collection! A collector's bag is included to keep all the gems safe.Collect 24 stunning gemstones The beautifully polished gemstones for kids in this advent calendar include agate, green aventurine, hematite, sodalite, turquoise, tiger's eye, blue calcite, and more!Dig up a special crystal on the last day The final piece in the collection is a stunning rose quartz, which kids unearthed from a mini digging brick, just like a true geologist!Create one-of-a-kind jewelry This Christmas advent calendar includes five jewelry settings so kids can create their own jewelry with their new gemstones! This calendar will bring joy all year long!Award-winning product Winner of the Toy Association's Toy of the Year award, Blue Marble proudly develops products that foster education, imagination, and creativity, and has a US-based support team to ensure a first-class user experience!