Geneva — An exceptionally rare blue diamond went under the hammer in Geneva Tuesday, selling for almost $44 million, making it one of the most expensive diamonds ever sold at auction, Christie's ...

The 12.03-carat 'Blue Moon' diamond, set in a ring, was said to be among the largest known fancy vivid blue diamonds and was the showpiece gem at the Sotheby's jewelry auction.

The storied past of the 45.52-carat sapphire-blue gemstone hails back to the days before the French Revolution. Beth Py-Lieberman - Senior Editor. September 26, 2023. Get our newsletter!