Product process: grinding and polishing_x000D_ Stone size: the stone in the box is about 4~8mm_x000D_ Box size: about 95*60mm_x000D_ Product weight: about 50g_x000D_ Product material: rough 11. Natural mineral stone: It contains various crystals and mineral rocks. The best collection box for beginners, the best geological textbook for children. 22. Unique design: Made of different rough stones. Each stone is unique and helps to understand and identify each type of rock, gem and mineral in the collection. It can also be a countdown calendar. 33. Reusable decoration: These soft natural ores can be reused. This Christmas Advent calendar is very suitable for Christmas decorations in homes, schools, dormitories, children's rooms, etc. 44. Perfect Christmas toy: Suitable for childrens birthday party gifts, gifts, daily gifts, school prizes, preschool props, teaching aids, parent-child interaction and holiday gift bags. 55. Surprise Every Day: The advent calendars help you develop the patience of your kids and your babies will get different surprises and happiness every day.Due to the lighting effects and shooting angles, there is color difference in the product, please understand._x000D_ Due to manual measurement, there is a tolerance in the product size.1 box Ore Toys(24pcs)