Gems and Minerals December 20, 2011

See milky white gypsum crystals and stalactites, a six-foot wall of blood-red rhodochrosite crystals, an eight-pound nugget of crystallized gold, Brazilian topaz, California watermelon tourmaline, Australian opals, intense blue azurite, green malachite, four-inch zeolite needle sprays from India, and hundreds of other dazzling specimens from around the world. Hands-on activities and videos help young explorers learn about mineral characteristics and how minerals form.