Tiffany & Co. celebrates a mega anniversary this year with plans to open 24 new stores. Here, a few fun figures about the jewelry juggernaut

1 in 400,000

The number of one-carat-plus diamonds that are blue

With all due respect to the Duchess of Cambridge and her classic sapphire, a blue diamond's the way to go for a truly rare "something blue." It's more durable (the diamond is still the hardest substance known to man) and has a higher refractive index (read: more sparkly!) than sapphires.

"Anniversary Blue" ring, price upon request, Tiffany

Photo: Courtesy of Tiffany & Co.

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