The National Geographic 15-pound Premium Polished Gemstone Set is a fantastic collection of rocks, crystals, and minerals that kids and adults will love! This Kit Includes: 15 Pounds of 3/4-inch Polished Gemstones, 1 Learning Guide, 1 Full-Color Identification Sheet. The variety of gemstones in this kit is astounding! You’ll receive Agate, Amethyst, Blue Quartz, Dalmatian Jasper, Green Aventurine, Hematite, Howlite, Red Jasper, Rose Quartz, Snowflake Obsidian, Sodalite, Tiger’s Eye, Unakite, and White Quartz! Quantities of each gem may vary from kit to kit. This rock collection is a fantastic STEM set for kids with an interest in geology and rock collecting. It’s also awesome for adults! These stones are perfect as aquarium rocks, or as stones for plants. You can use them as home decor in candle holders, alongside healing crystal displays, or incorporate them into your own homemade jewelry! A learning guide inside provides insight into each type of stone, and an identification sheet allows you to quickly recognize each gem in your kit. These polished gemstones are phenomenal because you can see beautiful, minute details in each rock and crystal. You and your family will treasure these specimens forever!National Geographic Toys makes the highest quality hands-on science toys, and all products are backed by exceptional service. About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.