Discover the hidden wonders beneath our feet with this elegant 48-card knowledge deck. Each card presents a captivating question about Earth's most treasured minerals, gems, and rocks—from the legendary Hope Diamond to the crystalline formations of underground caves. Beautifully illustrated with color photography, this collection explores the geological marvels that shape our world, revealing how these natural wonders are far more than just beautiful objects. Uncover the science and stories behind precious gems, cultured pearls, and ancient monuments like Stonehenge. Perfect for curious minds seeking to deepen their understanding of the mineral kingdom's extraordinary significance to human civilization and our planet's very foundation.

• 48 cards
• Recycled paper, soy based ink
• 3.25" x 4" x 0.75" 
• Printed in the US