One of the most famous and popular Gems in world was was owned by Countess Mona von Bismarck, and its know as Bismark Sapphire Necklace which is located in Sri Lanka and designed by the popular designer Cartier. This Bismark Sapphire Necklace Gems was 98.6-carat deep blue sapphire in a diamond. And this famous Gems was known to be a piece of gift to the Smithsonian Institute by Countess Mona von Bismark in 1967. The Bismarck Sapphire like all other corundum originated about 500 million to 2 billion years ago, about 60 km to 400 km deep inside the earth, in its upper mantle, where extremes of temperature and pressure were conducive to their formation.
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