The 98.57-carat Bismarck Sapphire is mounted in a platinum necklace designed by Cartier, Inc., set with 312 baguette and round brilliant cut diamonds and accented with 8 square-cut sapphires. The necklace is named after its donor, Countess Mona von Bismarck, an American socialite who married German Count Eduard von Bismarck in the late 1930s. She donated the necklace to the Smithsonian in 1967.

Çifte Minareli Medrese, posted earlier: