Rocks and Minerals Smithsonian 2018 Wall Calendar

"The Smithsonian 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. The collection is used for scientific research, education programs, and public exhibitions. Born of fluid, heat, and pressure, gems [...]
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"The Smithsonian 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. The collection is used for scientific research, education programs, and public exhibitions. Born of fluid, heat, and pressure, gems dazzle us with their breathtaking colors, shapes, and diversity. The gems in the National Gem Collection were discovered in all corners of the world and are among the Earth's great splendors. Minerals are more than beautiful display pieces, they are the very building blocks of solid celestial bodies. Minerals make up the Earth, the Moon, and the meteorites that voyage to Earth from other parts of the Solar System. They hold the tangible evidence that scientists need to learn about our world. Modern civilization relies heavily on mineral resources. You use minerals every day more than you may imagine. Rocks and Minerals 2018 features specimens of amazing form and color miraculously created