• Advent calendar with 24 windows to discover a precious shell or mineral every day from December 1st until Christmas. • Includes a variety of 21 types of raw stones, 20 g of colored agate, a turquoise hand, and a turquoise necklace. • Encourages educational learning about geology by allowing children to learn about the formation and characteristics of each gem. • The stones feature natural shapes and sparkles that allow them to be used as home decoration after the holidays. • As they are natural stones, each piece is unique with individual variations in color, shape, texture, and size.