When colored red by chromium, it’s a ruby. Pure corundum is clear, but when colored blue by titanium impurities, it’s called a sapphire. Sapphires are a variety of corundum, the third-hardest mineral. They returned that night to scale the museum wall, climb through a bathroom window, and steal 22 of the most precious jewels in the world.Īmong them were the Eagle Diamond, the DeLong Star Ruby, and, most famous of all, the Star of India sapphire. In October 1964, three young thieves cased the American Museum of Natural History in New York City. The Star of India is a nearly flawless golf ball–sized star sapphire stolen in the jewel heist of the century.
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