Spark a curiosity in geology with this interactive field guide from Klutz. Use the 36 stunning mineral and gem samples to complete your ultimate rock collection. Then create a beautiful geode formation with the crystal and plaster powders. Discover hidden secrets about your rocks through hands-on-activities, including making a DIY rock tumbler with easy-to-find supplies and using the Mohs' scale.
Comes with a 32 page book with crystal clear instructions.