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Did you know that aluminum used to be considered such a rare and precious commodity that Napoleon Bonaparte's nephew, had a rattle and other toys made of aluminum, as a status symbol? Even though aluminum is the third most abundant element in the Earth's crust, at the time it was extremely difficult to produce. In fact, aluminum was selected as the material to use for the 100-ounce capstone of the Washington Monument in 1884, a time when one ounce cost the daily wage of a common worker on the project. The capstone, which was set in place on December 6, 1884, was the largest single piece of cast aluminum  at the time.