NATIONAL GEOGRAPHIC Rock Collection Advent Calendar 2025 - Advent Calendar for Kids with 24 Gemstones, Minerals & Fossils for Kids, Complete Gem & Fossil Collection Christmas Countdown CalendarBrand: Blue Marble Color: Multicolor Features: STUNNING SPECIMENS FROM AROUND THE WORLD The polished rocks, gems, and fossils in this advent calendar include Geode; Pyrite; Rose Quartz; Red, Black, and Green Spotted Jasper; Agate; Tiger's Eye; Brachiopod; Black Urchin & more! 24 DAYS OF TREASURES Each day leading up to Christmas, kids open a panel to reveal a special rock, mineral, fossil or gemstone! With this Christmas countdown calendar, they can

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