Meilleur Vendeur Ultimate Rocks & Gems Collection
There's a lot to learn about earth science, just look at the ground. Junior geologists can start their own display-case collection with 48 different rocks and minerals.
Future Geologists, Fast Facts and Colour Photos, Starting a Collection, Exploring the Natural World
Topics and Themes:
Geology, Gems, Collecting Samples, Luster, Hardness, Texture, Other Identifying Features