Rock Mineral and Gem Knowledge Cards

This quiz deck presents a well-rounded sampling of mineral lore in a Q&A format, with a question—often accompanied by a color photograph—on the front and the answer on the back of each of the 48 cards. Together they offer a fascinating tour of the mineral kingdom, from the legendary Hope Diamond to corals and cultured pearls, dazzling crystalline caves, and the mysterious sarsens of Stonehenge.