The Smithsonian Institution mineral and gem collection consists of approximately 350,000 mineral specimens and 10,000 gems, making it one of the largest of its kind in the world. Gems dazzle us with their breathtaking colors, shapes, and diversity. Minerals are more than beautiful; they are the very building blocks of the universe. Rocks and Minerals 2014 features specimens of amazing color and form, accompanied by informative text.